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The Alameda County city counted 124,321 people in 2020 and is remembered for the 1960s Free Speech Movement that began on campus.","sources":["wp-berkeley","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Berkeley city\" (2.37 km); 2020 population vs Census PL 94-171 POP100 (124321); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.87167,"lon":-122.27278,"category":"city","toleranceKm":3,"hint":"Alameda County; a university town north of Oakland."},{"id":"bay-san-jose","name":"San Jose","tier":1,"explanation":"Founded in 1777 as El Pueblo de San José de Guadalupe, California's first civilian settlement, San Jose later served as the state's first capital. With 1,013,240 residents in 2020 it is the only Bay Area city above a million and the seat of Santa Clara County.","sources":["wp-san-jose","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county","county-seat"],"aliases":["San José"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Jose city\" (8.07 km), 0.44 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (1013240); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.33611,"lon":-121.89056,"category":"city","toleranceKm":4,"hint":"Santa Clara County seat; the Bay Area's most populous city."},{"id":"bay-palo-alto","name":"Palo Alto","tier":1,"explanation":"Named for El Palo Alto, a tall coast redwood on San Francisquito Creek, this Santa Clara County city grew up around Stanford University. The garage where Hewlett-Packard began is often called the birthplace of Silicon Valley; 68,572 people lived here in 2020.","sources":["wp-palo-alto","wp-hp-garage","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Palo Alto city\" (5.53 km), 0.03 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (68572); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.44444,"lon":-122.16,"category":"city","toleranceKm":3,"hint":"Santa Clara County; the city beside Stanford University."},{"id":"bay-sausalito","name":"Sausalito","tier":1,"explanation":"The first town across the Golden Gate in Marin County, Sausalito is known for its hillside homes and floating houseboat community. During World War II the Bechtel-run Marinship yard on its shoreline built Liberty ships for the war effort; 7,269 people lived here in 2020.","sources":["wp-sausalito","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Sausalito city\" (0.58 km); 2020 population vs Census PL 94-171 POP100 (7269); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.85917,"lon":-122.48528,"category":"city","toleranceKm":3,"hint":"Marin County; the first town north of the Golden Gate Bridge."},{"id":"bay-napa","name":"Napa","tier":1,"explanation":"The county seat and largest city of Napa County sits on the Napa River at the southern end of the famed wine valley. With 79,246 residents in 2020 it is a principal city of Wine Country and a working town as much as a tourist gateway.","sources":["wp-napa","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","napa-county","county-seat","wine-country"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Napa city\" (0.78 km); 2020 population vs Census PL 94-171 POP100 (79246); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.30472,"lon":-122.29889,"category":"city","hint":"Napa County seat on the Napa River."},{"id":"bay-santa-rosa","name":"Santa Rosa","tier":1,"explanation":"Seat of Sonoma County and the largest city in California's Wine Country, Santa Rosa had 178,127 residents in 2020. Horticulturist Luther Burbank's home and gardens are preserved here, and Peanuts creator Charles Schulz gave the city its museum and its airport's name.","sources":["wp-santa-rosa","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county","county-seat"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Santa Rosa city\" (0.33 km); 2020 population vs Census PL 94-171 POP100 (178127); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)","note":"\"Largest city in the North Bay\" checked against PL 2020 counts (Santa Rosa 178,127 > Vallejo 126,090 > Fairfield 119,881)."}],"kind":"place","map":"bay","lat":38.44861,"lon":-122.70472,"category":"city","hint":"Sonoma County seat; the largest city in the North Bay."},{"id":"bay-fremont","name":"Fremont","tier":1,"explanation":"Fremont incorporated in 1956 by uniting five towns, including Mission San José, site of the 1797 Spanish mission. The Alameda County city had 230,504 residents in 2020 and hosts the former NUMMI auto plant, now Tesla's factory.","sources":["wp-fremont","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Fremont city\" (7.32 km), Nominatim/OSM: Fremont civic centre; 2020 population vs Census PL 94-171 POP100 (230504); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.5486,"lon":-121.9883,"category":"city","toleranceKm":4,"hint":"Alameda County; the large city on the southeast shore of the Bay."},{"id":"bay-richmond","name":"Richmond","tier":1,"explanation":"This Contra Costa County city built hundreds of ships in Henry Kaiser's World War II shipyards, a story told at the Rosie the Riveter national historical park. Standard Oil set up operations here in 1901 at what is now the Chevron Richmond Refinery; the city had 116,448 residents in 2020.","sources":["wp-richmond","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Richmond city\" (2.15 km); 2020 population vs Census PL 94-171 POP100 (116448); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.93583,"lon":-122.34778,"category":"city","toleranceKm":3,"hint":"Contra Costa County; on the East Bay shore facing San Rafael."},{"id":"bay-daly-city","name":"Daly City","tier":1,"explanation":"Named for landowner John Daly and incorporated in 1911, Daly City sits just over the San Francisco line in San Mateo County and had 104,901 residents in 2020. Its Westlake tract inspired the song 'Little Boxes', and a third of its residents are Filipino, one of the highest shares of any US city.","sources":["wp-daly-city","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Daly City city\" (0.04 km); 2020 population vs Census PL 94-171 POP100 (104901); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.68639,"lon":-122.46833,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; immediately south of San Francisco."},{"id":"bay-walnut-creek","name":"Walnut Creek","tier":1,"explanation":"A Contra Costa County city at the foot of Mount Diablo, Walnut Creek took off after Broadway Plaza opened in 1951 as the county's first major retail center. It incorporated in 1914, sits at the junction of the highways from Sacramento and San Jose, and counted 70,127 residents in 2020.","sources":["wp-walnut-creek","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Walnut Creek city\" (2.19 km); 2020 population vs Census PL 94-171 POP100 (70127); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.90639,"lon":-122.065,"category":"city","toleranceKm":3,"hint":"Contra Costa County; at the western foot of Mount Diablo."},{"id":"bay-vallejo","name":"Vallejo","tier":1,"explanation":"Named for General Mariano Guadalupe Vallejo, this Solano County city briefly served as California's capital in 1852 and 1853. Mare Island Naval Shipyard, founded in 1854 as the first US Navy base on the Pacific, operated here until 1996; the population was 126,090 in 2020.","sources":["wp-vallejo","wp-mare-island-naval-shipyard","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","solano-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Vallejo city\" (2.42 km), 2.5 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (126090); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)","note":"Point is 2.5 km east of City Hall (OSM 38.10236,-122.26060), within the 4 km tolerance."}],"kind":"place","map":"bay","lat":38.11306,"lon":-122.23583,"category":"city","toleranceKm":4,"hint":"Solano County; home of the former Mare Island Naval Shipyard."},{"id":"bay-alameda","name":"Alameda","tier":2,"explanation":"An island city in Alameda County, separated from Oakland by a tidal canal dredged through the marshland between the two cities. The former Naval Air Station Alameda closed in 1997, and the city, with 78,280 residents in 2020, is known for its 1932 Art Deco Alameda Theatre.","sources":["wp-alameda","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Alameda city\" (2.03 km); 2020 population vs Census PL 94-171 POP100 (78280); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.75611,"lon":-122.27444,"category":"city","toleranceKm":3,"hint":"Alameda County; an island city beside Oakland."},{"id":"bay-emeryville","name":"Emeryville","tier":2,"explanation":"Wedged between Oakland and Berkeley at the eastern approach to the Bay Bridge, this tiny Alameda County city had 12,905 residents in 2020. Once as famous for gambling houses as for industry, it is now headquarters of Pixar Animation Studios.","sources":["wp-emeryville","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Emeryville city\" (1.64 km); 2020 population vs Census PL 94-171 POP100 (12905); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.83139,"lon":-122.28528,"category":"city","toleranceKm":2,"hint":"Alameda County; the small city at the East Bay foot of the Bay Bridge."},{"id":"bay-mountain-view","name":"Mountain View","tier":2,"explanation":"This Santa Clara County city is headquarters of Google and home to NASA's Ames Research Center at Moffett Field. It had 82,376 residents in 2020 and takes its name from its views of the Santa Cruz Mountains.","sources":["wp-mountain-view","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Mountain View city\" (1.56 km); 2020 population vs Census PL 94-171 POP100 (82376); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.38611,"lon":-122.08389,"category":"city","toleranceKm":2.5,"hint":"Santa Clara County; home of the Googleplex."},{"id":"bay-redwood-city","name":"Redwood City","tier":2,"explanation":"The seat of San Mateo County, Redwood City grew from a port shipping redwood lumber cut in the hills behind it. Its slogan 'Climate Best by Government Test' dates from a 1920s promotion; 84,292 people lived here in 2020.","sources":["wp-redwood-city","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county","county-seat"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Redwood City city\" (4.12 km), 0.79 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (84292); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.48278,"lon":-122.23611,"category":"city","toleranceKm":3,"hint":"San Mateo County seat, on the Bay side of the Peninsula."},{"id":"bay-san-mateo","name":"San Mateo","tier":2,"explanation":"One of the Peninsula's larger cities, San Mateo had 105,661 residents in 2020 and shares its name with the county. It sits at the western end of the San Mateo–Hayward Bridge, and its Bay Meadows racetrack was torn down in 2008.","sources":["wp-san-mateo","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Mateo city\" (0.72 km); 2020 population vs Census PL 94-171 POP100 (105661); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.55417,"lon":-122.31306,"category":"city","toleranceKm":3,"hint":"San Mateo County; at the Peninsula end of the San Mateo–Hayward Bridge."},{"id":"bay-hayward","name":"Hayward","tier":2,"explanation":"Hayward gives its name to the Hayward Fault, which runs directly beneath the city, and to the bridge that crosses the Bay to San Mateo. With 162,954 residents in 2020 it is the third-largest city in Alameda County and home to Cal State East Bay.","sources":["wp-hayward","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Hayward city\" (5.1 km), 0.48 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (162954); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.66882,"lon":-122.0808,"category":"city","toleranceKm":3,"hint":"Alameda County; East Bay city that gives its name to a major fault."},{"id":"bay-concord","name":"Concord","tier":2,"explanation":"With 125,410 residents in 2020, Concord ranks first in population among Contra Costa County's cities. For decades it hosted the Concord Naval Weapons Station, whose Port Chicago pier was the site of a 1944 munitions explosion that killed 320 people.","sources":["wp-concord","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Concord city\" (2.67 km); 2020 population vs Census PL 94-171 POP100 (125410); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.97806,"lon":-122.03111,"category":"city","toleranceKm":3,"hint":"Contra Costa County's most populous city."},{"id":"bay-mill-valley","name":"Mill Valley","tier":2,"explanation":"Tucked into redwood canyons at the base of Mount Tamalpais in Marin County, Mill Valley is named for a 19th-century sawmill. The Dipsea Race, run from here over the mountain to Stinson Beach since 1905, is one of its oldest traditions; the city had 14,231 residents in 2020.","sources":["wp-mill-valley","wp-dipsea-race","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Mill Valley city\" (0.32 km); 2020 population vs Census PL 94-171 POP100 (14231); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.90611,"lon":-122.545,"category":"city","toleranceKm":2.5,"hint":"Marin County; redwood canyons at the foot of Mount Tamalpais."},{"id":"bay-san-rafael","name":"San Rafael","tier":2,"explanation":"The seat and largest city of Marin County grew around Mission San Rafael Arcángel, founded in 1817. Frank Lloyd Wright's Marin County Civic Center stands here, and 61,271 people lived in the city in 2020.","sources":["wp-san-rafael","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county","county-seat"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Rafael city\" (2.27 km); 2020 population vs Census PL 94-171 POP100 (61271); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.97361,"lon":-122.53111,"category":"city","toleranceKm":3,"hint":"Marin County seat; home of a Frank Lloyd Wright civic center."},{"id":"bay-petaluma","name":"Petaluma","tier":2,"explanation":"Petaluma's poultry farms once made it the 'Egg Capital of the World', nicknamed 'Chickaluma', and the coal-lamp egg incubator was invented here in 1879. The Petaluma River carried its produce to San Francisco; the Sonoma County city had 59,776 residents in 2020.","sources":["wp-petaluma","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Petaluma city\" (0.46 km); 2020 population vs Census PL 94-171 POP100 (59776); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.24583,"lon":-122.63139,"category":"city","hint":"Sonoma County; river town once famed for its egg farms."},{"id":"bay-sonoma","name":"Sonoma","tier":2,"explanation":"Sonoma's plaza was the site of the 1846 Bear Flag Revolt, and the town grew from Mission San Francisco Solano, founded in 1823. Separate from the much larger county that shares its name, the city had 10,739 residents in 2020.","sources":["wp-sonoma","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county","wine-country"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Sonoma city\" (0.25 km); 2020 population vs Census PL 94-171 POP100 (10739); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.29194,"lon":-122.45778,"category":"city","hint":"Sonoma County; the plaza town where the Bear Flag was raised."},{"id":"bay-half-moon-bay","name":"Half Moon Bay","tier":2,"explanation":"This San Mateo County coastal city is known for its October pumpkin festival and for Mavericks, the big-wave surf break just off its northern edge. Settled in the 1840s as the county's first real town, it had 11,795 residents in 2020.","sources":["wp-half-moon-bay","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["coast","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Half Moon Bay city\" (0.99 km); 2020 population vs Census PL 94-171 POP100 (11795); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.45889,"lon":-122.43694,"category":"city","hint":"San Mateo County; the coastal pumpkin town near Mavericks."},{"id":"bay-pacifica","name":"Pacifica","tier":2,"explanation":"Strung along the Pacific coast directly south of San Francisco in San Mateo County, Pacifica had 38,640 residents in 2020. From Sweeney Ridge above the city, Gaspar de Portolá's expedition became the first Europeans to see San Francisco Bay, in November 1769.","sources":["wp-pacifica","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["coast","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Pacifica city\" (1.94 km); 2020 population vs Census PL 94-171 POP100 (38640); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.62278,"lon":-122.48556,"category":"city","toleranceKm":3,"hint":"San Mateo County; the coastal city just south of San Francisco."},{"id":"bay-south-san-francisco","name":"South San Francisco","tier":2,"explanation":"Its hillside sign still proclaims 'South San Francisco The Industrial City', but this San Mateo County city is better known today as the birthplace of biotechnology: Genentech opened here in 1976. Population was 66,105 in 2020.","sources":["wp-south-san-francisco","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"aliases":["South SF","SSF"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"South San Francisco city\" (0 km); 2020 population vs Census PL 94-171 POP100 (66105); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.6551,"lon":-122.3762,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; 'The Industrial City' hillside sign."},{"id":"bay-burlingame","name":"Burlingame","tier":2,"explanation":"Named for diplomat Anson Burlingame, this San Mateo County city is known for its eucalyptus groves and tree-lined avenues just south of the airport. It had 31,386 residents in 2020.","sources":["wp-burlingame","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Burlingame city\" (0.74 km); 2020 population vs Census PL 94-171 POP100 (31386); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.58333,"lon":-122.36361,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; eucalyptus-lined city south of SFO."},{"id":"bay-menlo-park","name":"Menlo Park","tier":2,"explanation":"Menlo Park, in San Mateo County, is home to Meta's headquarters, SRI International, and the venture-capital firms of Sand Hill Road; Google was founded here. It had 33,780 residents in 2020.","sources":["wp-menlo-park","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Menlo Park city\" (4.32 km), 0.54 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (33780); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.45278,"lon":-122.18333,"category":"city","toleranceKm":2,"hint":"San Mateo County; Sand Hill Road and Meta's headquarters."},{"id":"bay-cupertino","name":"Cupertino","tier":2,"explanation":"Apple's headquarters have been in this Santa Clara County city since the company's early years, now in the ring-shaped Apple Park. The name comes from a creek that Juan Bautista de Anza's cartographer named for Saint Joseph of Cupertino; the city had 60,381 residents in 2020.","sources":["wp-cupertino","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Cupertino city\" (1.22 km); 2020 population vs Census PL 94-171 POP100 (60381); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.32306,"lon":-122.03194,"category":"city","toleranceKm":3,"hint":"Santa Clara County; home of Apple Park."},{"id":"bay-santa-clara","name":"Santa Clara","tier":2,"explanation":"The city grew around Mission Santa Clara de Asís, founded in 1777 and now on the Santa Clara University campus. Headquarters of Intel and site of Levi's Stadium, the 49ers' home, it had 127,647 residents in 2020.","sources":["wp-santa-clara","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Santa Clara city\" (1.14 km); 2020 population vs Census PL 94-171 POP100 (127647); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.35444,"lon":-121.96917,"category":"city","toleranceKm":3,"hint":"Santa Clara County; mission town that hosts Levi's Stadium."},{"id":"bay-sunnyvale","name":"Sunnyvale","tier":3,"explanation":"With 155,805 residents in 2020, Sunnyvale is the second-most populous city in Santa Clara County. Once orchard land, it became a center of the aerospace and semiconductor industries, where Lockheed moved its headquarters in 1956 and Yahoo later set up its own.","sources":["wp-sunnyvale","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Sunnyvale city\" (1.91 km); 2020 population vs Census PL 94-171 POP100 (155805); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.37111,"lon":-122.0375,"category":"city","toleranceKm":3,"hint":"Santa Clara County; between Mountain View and Santa Clara."},{"id":"bay-milpitas","name":"Milpitas","tier":3,"explanation":"Its name means 'little cornfields' in Spanish. This Santa Clara County city at the southeast corner of the Bay had 80,273 residents in 2020 and is home to the Great Mall, built in a former Ford assembly plant.","sources":["wp-milpitas","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Milpitas city\" (0.4 km); 2020 population vs Census PL 94-171 POP100 (80273); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.43472,"lon":-121.895,"category":"city","toleranceKm":3,"hint":"Santa Clara County; the city at the Bay's southeastern corner."},{"id":"bay-los-gatos","name":"Los Gatos","tier":3,"explanation":"Named 'the cats' after the cougars and bobcats of the surrounding foothills, Los Gatos sits where Santa Clara County meets the Santa Cruz Mountains. Netflix is headquartered in the town, which had 33,529 residents in 2020.","sources":["wp-los-gatos","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Los Gatos town\" (0.81 km); 2020 population vs Census PL 94-171 POP100 (33529); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.23611,"lon":-121.96167,"category":"town","toleranceKm":3,"hint":"Santa Clara County; foothill town at the base of the Santa Cruz Mountains."},{"id":"bay-saratoga","name":"Saratoga","tier":3,"explanation":"A quiet, affluent foothill city in Santa Clara County, Saratoga is known for Villa Montalvo, the Hakone Japanese gardens, and the Mountain Winery. It had 31,051 residents in 2020.","sources":["wp-saratoga","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Saratoga city\" (0.76 km); 2020 population vs Census PL 94-171 POP100 (31051); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.2725,"lon":-122.01944,"category":"city","toleranceKm":3,"hint":"Santa Clara County; foothill city known for Villa Montalvo and Hakone Gardens."},{"id":"bay-campbell","name":"Campbell","tier":3,"explanation":"A former orchard town in Santa Clara County, Campbell is home to the Pruneyard shopping center, whose US Supreme Court case established free-speech rights in California shopping malls. Population was 43,959 in 2020.","sources":["wp-campbell","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Campbell city\" (0.43 km); 2020 population vs Census PL 94-171 POP100 (43959); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.28389,"lon":-121.955,"category":"city","toleranceKm":2.5,"hint":"Santa Clara County; small city wedged between San Jose and Los Gatos."},{"id":"bay-los-altos","name":"Los Altos","tier":3,"explanation":"A low-density residential city in Santa Clara County, Los Altos had 31,625 residents in 2020. In 1976 Steve Jobs and Steve Wozniak built the first 50 Apple I computers in the Jobs family garage here.","sources":["wp-los-altos","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Los Altos city\" (0.09 km); 2020 population vs Census PL 94-171 POP100 (31625); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.36806,"lon":-122.0975,"category":"city","toleranceKm":2,"hint":"Santa Clara County; residential city between Palo Alto and Cupertino."},{"id":"bay-foster-city","name":"Foster City","tier":3,"explanation":"A planned community built in the 1960s on Brewer Island in the Bay marshes, Foster City is laced with lagoons and named for developer T. Jack Foster. The San Mateo County city had 33,805 residents in 2020.","sources":["wp-foster-city","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Foster City city\" (2.03 km); 2020 population vs Census PL 94-171 POP100 (33805); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.55139,"lon":-122.26639,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; planned lagoon city on filled Bay marshland."},{"id":"bay-san-bruno","name":"San Bruno","tier":3,"explanation":"This San Mateo County city beside the airport is home to YouTube's headquarters and the Golden Gate National Cemetery. A 2010 natural-gas pipeline explosion killed eight people and destroyed 38 homes here; the city had 43,908 residents in 2020.","sources":["wp-san-bruno","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Bruno city\" (1.45 km); 2020 population vs Census PL 94-171 POP100 (43908); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.625,"lon":-122.415,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; just west of SFO."},{"id":"bay-millbrae","name":"Millbrae","tier":3,"explanation":"Named for the estate of banker Darius Ogden Mills, Millbrae sits at the southern edge of San Francisco International Airport in San Mateo County. Its station is where BART meets Caltrain; the city had 23,216 residents in 2020.","sources":["wp-millbrae","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Millbrae city\" (0.21 km); 2020 population vs Census PL 94-171 POP100 (23216); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.60083,"lon":-122.40139,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; the city at SFO's southern edge with a BART–Caltrain hub."},{"id":"bay-san-carlos","name":"San Carlos","tier":3,"explanation":"San Carlos, in San Mateo County, has a small general-aviation airport, bought by the county in 1964, that is home to the Hiller Aviation Museum and its collection of more than forty aircraft. It had 30,722 residents in 2020.","sources":["wp-san-carlos","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Carlos city\" (0.4 km); 2020 population vs Census PL 94-171 POP100 (30722); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.4955,"lon":-122.2668,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; small Peninsula city with its own general-aviation airport."},{"id":"bay-belmont","name":"Belmont","tier":3,"explanation":"A hilly San Mateo County city, Belmont is home to Ralston Hall, the mansion of Bank of California founder William Chapman Ralston. It had 28,335 residents in 2020.","sources":["wp-belmont","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Belmont city\" (0.48 km); 2020 population vs Census PL 94-171 POP100 (28335); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.51806,"lon":-122.29167,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; hilly city between San Carlos and San Mateo."},{"id":"bay-brisbane","name":"Brisbane","tier":3,"explanation":"Tucked against San Bruno Mountain just south of the San Francisco line, Brisbane is a small San Mateo County city of 4,851 residents in 2020. Each holiday season since 1939 its residents have hung large illuminated stars on their homes, earning it the nickname 'City of Stars'.","sources":["wp-brisbane","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Brisbane city\" (1.57 km); 2020 population vs Census PL 94-171 POP100 (4851); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.6808,"lon":-122.4,"category":"city","toleranceKm":2.5,"hint":"San Mateo County; small city on the slope of San Bruno Mountain."},{"id":"bay-colma","name":"Colma","tier":3,"explanation":"Colma became the Bay Area's cemetery town after San Francisco outlawed new burials in 1900 and evicted most of its cemeteries in 1912. With 1,507 living residents in 2020 and an estimated 1.5 million graves, the San Mateo County town jokes that it is 'great to be alive in Colma'.","sources":["wp-colma","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Colma town\" (0.34 km); 2020 population vs Census PL 94-171 POP100 (1507); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.67889,"lon":-122.45556,"category":"town","toleranceKm":1.5,"hint":"San Mateo County; the necropolis where the dead vastly outnumber the living."},{"id":"bay-union-city","name":"Union City","tier":3,"explanation":"Union City incorporated in 1959 from the older settlements of Alvarado and Decoto; Alvarado served as the first seat of Alameda County. The city had 70,143 residents in 2020.","sources":["wp-union-city","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Union City city\" (2.69 km); 2020 population vs Census PL 94-171 POP100 (70143); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.59639,"lon":-122.04833,"category":"city","toleranceKm":3,"hint":"Alameda County; between Hayward and Fremont."},{"id":"bay-newark","name":"Newark","tier":3,"explanation":"Newark is an enclave: the Alameda County city is entirely surrounded by Fremont, having incorporated in September 1955 rather than join the city forming around it. It lies at the East Bay end of the Dumbarton Bridge and had 47,529 residents in 2020.","sources":["wp-newark","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Newark city\" (3.24 km), 0.43 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (47529); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.53333,"lon":-122.03333,"category":"city","toleranceKm":3,"hint":"Alameda County; small city entirely surrounded by Fremont."},{"id":"bay-pleasanton","name":"Pleasanton","tier":3,"explanation":"A Tri-Valley city in Alameda County, Pleasanton hosts the Alameda County Fairgrounds, whose horse track dating to 1858 is the oldest one-mile racetrack in the United States. The population was 79,871 in 2020.","sources":["wp-pleasanton","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county","tri-valley"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Pleasanton city\" (0.77 km); 2020 population vs Census PL 94-171 POP100 (79871); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.6625,"lon":-121.87472,"category":"city","toleranceKm":3,"hint":"Alameda County; Tri-Valley city with the county fairgrounds."},{"id":"bay-livermore","name":"Livermore","tier":3,"explanation":"Livermore, in eastern Alameda County, is home to Lawrence Livermore National Laboratory and one of California's oldest wine regions. A fire station here houses the Centennial Light, a bulb that has burned almost continuously since 1901; the city had 87,955 residents in 2020.","sources":["wp-livermore","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county","tri-valley"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Livermore city\" (0.92 km); 2020 population vs Census PL 94-171 POP100 (87955); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.68194,"lon":-121.76806,"category":"city","hint":"Alameda County; easternmost Bay Area city, wine and a national laboratory."},{"id":"bay-dublin","name":"Dublin","tier":3,"explanation":"Sitting at the crossroads of Interstates 580 and 680 in Alameda County, Dublin incorporated in 1982 and in 2013 was California's second-fastest-growing city. It had 72,589 residents in 2020, up more than 50 percent from 2010.","sources":["wp-dublin","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county","tri-valley"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Dublin city\" (2.3 km); 2020 population vs Census PL 94-171 POP100 (72589); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.70415,"lon":-121.91752,"category":"city","toleranceKm":3,"hint":"Alameda County; at the I-580/I-680 junction."},{"id":"bay-san-leandro","name":"San Leandro","tier":3,"explanation":"San Leandro, in Alameda County, had 91,008 residents in 2020. Portuguese immigrants from the Azores and Hawaii made up nearly two-thirds of its population by 1910, and C. L. Best, co-founder of Caterpillar, is among its native sons.","sources":["wp-san-leandro","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Leandro city\" (2.48 km); 2020 population vs Census PL 94-171 POP100 (91008); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.725,"lon":-122.15611,"category":"city","toleranceKm":3,"hint":"Alameda County; between Oakland and Hayward."},{"id":"bay-castro-valley","name":"Castro Valley","tier":3,"explanation":"Castro Valley was the fourth most populous unincorporated area in California at the 2020 census, with 66,441 residents governed directly by Alameda County. It takes its name from Don Guillermo Castro, the Californio ranchero who held the land here.","sources":["wp-castro-valley","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Castro Valley CDP\" (2.6 km); 2020 population vs Census PL 94-171 POP100 (66441); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.69417,"lon":-122.08639,"category":"town","toleranceKm":3,"hint":"Alameda County; large unincorporated community east of San Leandro."},{"id":"bay-orinda","name":"Orinda","tier":3,"explanation":"The first town east of the Caldecott Tunnel, Orinda is a Contra Costa County suburb of 19,514 residents in 2020. Its land lies within four Mexican-era ranchos, and the community did not incorporate as a city until 1985.","sources":["wp-orinda","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","lamorinda"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Orinda city\" (0.98 km); 2020 population vs Census PL 94-171 POP100 (19514); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.88278,"lon":-122.17972,"category":"city","toleranceKm":2.5,"hint":"Contra Costa County; just east of the Caldecott Tunnel."},{"id":"bay-lafayette","name":"Lafayette","tier":3,"explanation":"Named for the Marquis de Lafayette, this Contra Costa County city is the middle of the three 'Lamorinda' towns along Highway 24. Its reservoir is a popular walking loop; the city had 25,391 residents in 2020.","sources":["wp-lafayette","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","lamorinda"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Lafayette city\" (0.59 km); 2020 population vs Census PL 94-171 POP100 (25391); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.88583,"lon":-122.11806,"category":"city","toleranceKm":2.5,"hint":"Contra Costa County; the middle of Lamorinda."},{"id":"bay-moraga","name":"Moraga","tier":3,"explanation":"Moraga, in Contra Costa County, is home to Saint Mary's College of California and is named for Joaquín Moraga, whose family held the Rancho Laguna de los Palos Colorados. The town had 16,870 residents in 2020.","sources":["wp-moraga","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","lamorinda"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Moraga town\" (1.32 km); 2020 population vs Census PL 94-171 POP100 (16870); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.835,"lon":-122.12972,"category":"town","toleranceKm":2.5,"hint":"Contra Costa County; home of Saint Mary's College."},{"id":"bay-martinez","name":"Martinez","tier":3,"explanation":"The seat of Contra Costa County sits on the Carquinez Strait opposite Benicia. Naturalist John Muir lived here from 1880 until his death in 1914 and is buried here, and the city claims to be the birthplace of the martini; 37,287 people lived here in 2020.","sources":["wp-martinez","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","county-seat"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Martinez city\" (2.94 km), 0.6 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (37287); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.01944,"lon":-122.13417,"category":"city","toleranceKm":4,"hint":"Contra Costa County seat, on the Carquinez Strait."},{"id":"bay-pittsburg","name":"Pittsburg","tier":3,"explanation":"Founded as New York of the Pacific and later called Black Diamond for its coal, this Contra Costa County city renamed itself Pittsburg in 1911 after Pittsburgh, Pennsylvania, a year after Columbia Steel opened a mill here. It sits where Suisun Bay meets the Delta and had 76,416 residents in 2020.","sources":["wp-pittsburg","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","delta"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Pittsburg city\" (1.65 km); 2020 population vs Census PL 94-171 POP100 (76416); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.02806,"lon":-121.88472,"category":"city","toleranceKm":3,"hint":"Contra Costa County; Delta steel town spelled without the 'h'."},{"id":"bay-antioch","name":"Antioch","tier":3,"explanation":"Antioch, on the San Joaquin River in eastern Contra Costa County, had 115,291 residents in 2020, making it the county's third-most populous city. Coal mined in the hills to its south in the 19th century is remembered at the Black Diamond Mines regional park within its boundaries.","sources":["wp-antioch","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","delta"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Antioch city\" (3.09 km), 1.5 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (115291); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.005,"lon":-121.80583,"category":"city","toleranceKm":3,"hint":"Contra Costa County; Delta city near the Black Diamond Mines."},{"id":"bay-brentwood","name":"Brentwood","tier":3,"explanation":"A fast-growing city on the agricultural eastern edge of Contra Costa County, Brentwood is known for its U-pick orchards and farm stands along its Harvest Time farm-tour route. It had 64,292 residents in 2020.","sources":["wp-brentwood","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","contra-costa-county","delta"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Brentwood city\" (2.07 km); 2020 population vs Census PL 94-171 POP100 (64292); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.93194,"lon":-121.69583,"category":"city","hint":"Contra Costa County; far-east orchard town known for U-pick cherries."},{"id":"bay-benicia","name":"Benicia","tier":3,"explanation":"Benicia served as California's state capital for nearly thirteen months in 1853 and 1854, and its capitol building still stands as a state historic park. The Solano County city on the north bank of the Carquinez Strait had 27,131 residents in 2020.","sources":["wp-benicia","wikidata-benicia","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","solano-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Benicia city\" (1.05 km), 1.2 km from city hall (OSM Overpass); 2020 population vs Census PL 94-171 POP100 (27131); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.06333,"lon":-122.15611,"category":"city","toleranceKm":4,"hint":"Solano County; former state capital on the Carquinez Strait."},{"id":"bay-fairfield","name":"Fairfield","tier":3,"explanation":"The seat of Solano County, Fairfield is home to Travis Air Force Base and the Jelly Belly candy factory. On Interstate 80 in the North Bay, it had 119,881 residents in 2020.","sources":["wp-fairfield","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","solano-county","county-seat"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Fairfield city\" (1.96 km); 2020 population vs Census PL 94-171 POP100 (119881); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.25778,"lon":-122.05417,"category":"city","hint":"Solano County seat, between Vallejo and Sacramento."},{"id":"bay-vacaville","name":"Vacaville","tier":3,"explanation":"Founded in 1851 and named for rancher Juan Manuel Vaca, Vacaville sits on Interstate 80 in Solano County, where it is the county's third-largest city. Long known for the Nut Tree roadside stop, the city had 102,386 residents in 2020.","sources":["wp-vacaville","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","solano-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Vacaville city\" (0.64 km); 2020 population vs Census PL 94-171 POP100 (102386); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.35389,"lon":-121.97278,"category":"city","hint":"Solano County; I-80 city named for the Vaca family."},{"id":"bay-tiburon","name":"Tiburon","tier":3,"explanation":"Tiburon occupies the tip of a Marin County peninsula facing Angel Island and the San Francisco skyline; its name is Spanish for shark. Ferries run from its waterfront to Angel Island and the city; the town had 9,146 residents in 2020.","sources":["wp-tiburon","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Tiburon town\" (1.55 km); 2020 population vs Census PL 94-171 POP100 (9146); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.87361,"lon":-122.45667,"category":"town","toleranceKm":3,"hint":"Marin County; peninsula town with ferries to Angel Island."},{"id":"bay-larkspur","name":"Larkspur","tier":3,"explanation":"Larkspur is the Marin County terminal for Golden Gate Ferry service to San Francisco, and its Magnolia Avenue downtown is a National Register historic district. The city had 13,064 residents in 2020.","sources":["wp-larkspur","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Larkspur city\" (0.84 km); 2020 population vs Census PL 94-171 POP100 (13064); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.93417,"lon":-122.53528,"category":"city","toleranceKm":1.5,"hint":"Marin County; the Golden Gate Ferry terminal town."},{"id":"bay-corte-madera","name":"Corte Madera","tier":3,"explanation":"Its Spanish name is the command 'chop wood': redwood lumber cut here was shipped across the Bay to build San Francisco. The Marin County town had 10,222 residents in 2020.","sources":["wp-corte-madera","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Corte Madera town\" (1.87 km); 2020 population vs Census PL 94-171 POP100 (10222); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.92556,"lon":-122.5275,"category":"town","toleranceKm":1.5,"hint":"Marin County; small town whose name means 'chop wood'."},{"id":"bay-san-anselmo","name":"San Anselmo","tier":3,"explanation":"A Ross Valley town in Marin County of 12,830 residents in 2020, San Anselmo is known for the antique shops and restaurants that line San Anselmo Creek downtown.","sources":["wp-san-anselmo","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"San Anselmo town\" (1.1 km); 2020 population vs Census PL 94-171 POP100 (12830); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.97472,"lon":-122.56167,"category":"town","toleranceKm":1.5,"hint":"Marin County; antique-shop town in the Ross Valley."},{"id":"bay-fairfax","name":"Fairfax","tier":3,"explanation":"Fairfax, a small Marin County town of 7,605 residents in 2020, is a magnet for mountain bikers and road cyclists thanks to its position at the foot of Mount Tamalpais. In 2015 mountain-bike pioneer Joe Breeze and fellow Mountain Bike Hall of Fame members opened the Marin Museum of Bicycling downtown.","sources":["wp-fairfax","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Fairfax town\" (0.57 km); 2020 population vs Census PL 94-171 POP100 (7605); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.98722,"lon":-122.58889,"category":"town","toleranceKm":2,"hint":"Marin County; the town that claims the birth of mountain biking."},{"id":"bay-novato","name":"Novato","tier":3,"explanation":"Novato, in northern Marin County on San Pablo Bay, had 53,225 residents in 2020, though farmland and wetlands keep most of the city away from the water. The former Hamilton Air Force Base, where official weather records were kept until 1964, lies within the city.","sources":["wp-novato","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Novato city\" (3.12 km); 2020 population vs Census PL 94-171 POP100 (53225); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)","note":"\"Northernmost Marin city\" checked against Gazetteer latitudes of all Marin incorporated places (Novato 38.085 > Fairfax 37.989)."}],"kind":"place","map":"bay","lat":38.1075,"lon":-122.56972,"category":"city","hint":"Marin County's northernmost city."},{"id":"bay-point-reyes-station","name":"Point Reyes Station","tier":3,"explanation":"A former stop on the North Pacific Coast Railroad, this West Marin village is the main gateway to Point Reyes National Seashore. It had 895 residents in 2020 and is known for its dairy and cheese makers.","sources":["wp-point-reyes-station","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county","west-marin"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Point Reyes Station CDP\" (1.73 km); 2020 population vs Census PL 94-171 POP100 (895); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.06917,"lon":-122.80694,"category":"town","hint":"Marin County; gateway village to the Point Reyes National Seashore."},{"id":"bay-bolinas","name":"Bolinas","tier":4,"explanation":"Bolinas sits across a lagoon from Stinson Beach in West Marin, and its reclusive residents are famous for tearing down every Highway 1 sign that points the way into town. The unincorporated village had 1,483 residents in 2020.","sources":["wp-bolinas","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county","west-marin","coast"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Bolinas CDP\" (2.23 km); 2020 population vs Census PL 94-171 POP100 (1483); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.90944,"lon":-122.68639,"category":"town","toleranceKm":3,"hint":"Marin County; the coastal village that removes its own road signs."},{"id":"bay-stinson-beach","name":"Stinson Beach","tier":4,"explanation":"A small West Marin beach town of 541 residents in 2020, Stinson Beach is about a 35-minute drive from the Golden Gate Bridge along Highway 1. Each June it is the finish line of the Dipsea Race, the second-oldest footrace in the United States.","sources":["wp-stinson-beach","wp-dipsea-race","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","marin-county","west-marin","coast"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Stinson Beach CDP\" (0.54 km); 2020 population vs Census PL 94-171 POP100 (541); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.90056,"lon":-122.64444,"category":"town","toleranceKm":3,"hint":"Marin County; the beach town at the end of the Dipsea Trail."},{"id":"bay-healdsburg","name":"Healdsburg","tier":3,"explanation":"Healdsburg was laid out in 1857 by Harmon Heald, an Ohio businessman who had been squatting on the Rancho Sotoyome grant, and sits on the Russian River where the Dry Creek, Alexander, and Russian River wine valleys converge. The Sonoma County city had 11,340 residents in 2020.","sources":["wp-healdsburg","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county","wine-country"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Healdsburg city\" (0.57 km); 2020 population vs Census PL 94-171 POP100 (11340); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.6175,"lon":-122.86639,"category":"city","hint":"Sonoma County; plaza town where three wine valleys meet."},{"id":"bay-sebastopol","name":"Sebastopol","tier":3,"explanation":"Sebastopol is the center of Sonoma County's Gravenstein apple country and the site of Luther Burbank's Gold Ridge experiment farm. It had 7,521 residents in 2020.","sources":["wp-sebastopol","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Sebastopol city\" (0.11 km); 2020 population vs Census PL 94-171 POP100 (7521); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.39917,"lon":-122.82694,"category":"city","hint":"Sonoma County; Gravenstein apple country."},{"id":"bay-calistoga","name":"Calistoga","tier":3,"explanation":"Sam Brannan bought more than 2,000 acres here in the 1860s to build a spa modeled on Saratoga Springs, New York, and the town was named Calistoga in 1867. The Napa County city at the head of the valley is known for hot-springs spas, volcanic-ash mud baths and its 'Old Faithful' geyser, and had 5,228 residents in 2020.","sources":["wp-calistoga","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","napa-county","wine-country"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Calistoga city\" (0.01 km); 2020 population vs Census PL 94-171 POP100 (5228); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.58139,"lon":-122.58278,"category":"city","hint":"Napa County; hot-springs resort at the head of the Napa Valley."},{"id":"bay-st-helena","name":"St. Helena","tier":3,"explanation":"St. Helena, in the middle of the Napa Valley, is surrounded by famous wineries and hosts the Culinary Institute of America's Greystone campus. The Napa County city had 5,430 residents in 2020.","sources":["wp-st-helena","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","napa-county","wine-country"],"aliases":["Saint Helena"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"St. Helena city\" (0.86 km); 2020 population vs Census PL 94-171 POP100 (5430); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.50528,"lon":-122.47028,"category":"city","hint":"Napa County; the small city at the heart of the Napa Valley."},{"id":"bay-yountville","name":"Yountville","tier":3,"explanation":"Named for George C. Yount, credited with planting the Napa Valley's first vineyard, Yountville is a Napa County town of 3,436 residents in 2020. It is home to the restaurant The French Laundry and to the Veterans Home of California.","sources":["wp-yountville","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","napa-county","wine-country"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Yountville city\" (1.1 km); 2020 population vs Census PL 94-171 POP100 (3436); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.40306,"lon":-122.36222,"category":"town","hint":"Napa County; tiny town famed for The French Laundry."},{"id":"bay-rio-vista","name":"Rio Vista","tier":4,"explanation":"Rio Vista is a Solano County city on the Sacramento River in the Delta, with 10,005 residents in 2020. In 1985 a humpback whale nicknamed Humphrey swam up the river past the town, drawing crowds before being guided back to sea.","sources":["wp-rio-vista","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","solano-county","delta"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Rio Vista city\" (1.57 km); 2020 population vs Census PL 94-171 POP100 (10005); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.16389,"lon":-121.69583,"category":"city","hint":"Solano County; Delta river town on the Sacramento."},{"id":"bay-pescadero","name":"Pescadero","tier":5,"explanation":"A farming and ranching village two miles inland from Highway 1 in San Mateo County, Pescadero had 595 residents in 2020 and sits beside the Pescadero Marsh wildlife refuge, with Pigeon Point Lighthouse to the south. Its name is Spanish for 'fishmonger'.","sources":["wp-pescadero","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["coast","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Pescadero CDP\" (1.15 km); 2020 population vs Census PL 94-171 POP100 (595); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.255,"lon":-122.38139,"category":"town","hint":"San Mateo County; coastal farming village near Pigeon Point."},{"id":"bay-woodside","name":"Woodside","tier":5,"explanation":"Woodside is a wealthy, rural-feeling town of 5,309 residents in 2020 in the San Mateo County foothills, where many residents keep horses and the town maintains a network of riding trails. The Filoli estate just outside town hosted the 2023 meeting between Presidents Biden and Xi Jinping.","sources":["wp-woodside","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Woodside town\" (0.92 km); 2020 population vs Census PL 94-171 POP100 (5309); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.4297,"lon":-122.2542,"category":"town","toleranceKm":3,"hint":"San Mateo County; horse country in the hills above Redwood City."},{"id":"bay-portola-valley","name":"Portola Valley","tier":5,"explanation":"Named for explorer Gaspar de Portolá, this San Mateo County town of 4,456 residents in 2020 sits directly on the San Andreas Fault. It incorporated in 1964 and remains one of the Peninsula's most rural-feeling towns.","sources":["wp-portola-valley","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Portola Valley town\" (1.66 km); 2020 population vs Census PL 94-171 POP100 (4456); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.375,"lon":-122.21861,"category":"town","toleranceKm":3,"hint":"San Mateo County; a town straddling the San Andreas Fault."},{"id":"bay-atherton","name":"Atherton","tier":5,"explanation":"Atherton, a San Mateo County town of 7,188 residents in 2020, is named for Faxon Atherton and has repeatedly ranked as the most expensive ZIP code in the United States. It is almost entirely residential, with large lots and no commercial district.","sources":["wp-atherton","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Atherton town\" (0.19 km); 2020 population vs Census PL 94-171 POP100 (7188); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.45861,"lon":-122.2,"category":"town","toleranceKm":1.5,"hint":"San Mateo County; America's most expensive ZIP code."},{"id":"bay-hillsborough","name":"Hillsborough","tier":5,"explanation":"Hillsborough, an exclusively residential San Mateo County town of 11,387 residents in 2020, has no commercial zoning and therefore no businesses within its limits. Its estates include Carolands Chateau and the whimsical 'Flintstone House' built in 1976.","sources":["wp-hillsborough","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["peninsula","san-mateo-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Hillsborough town\" (0.39 km); 2020 population vs Census PL 94-171 POP100 (11387); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.56028,"lon":-122.35639,"category":"town","toleranceKm":2.5,"hint":"San Mateo County; mansion town with no shops at all."},{"id":"bay-piedmont","name":"Piedmont","tier":5,"explanation":"Piedmont is an enclave: a small, affluent Alameda County city of 11,270 residents in 2020 that is entirely surrounded by Oakland. It incorporated in 1907 and has kept its independence ever since.","sources":["wp-piedmont","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["east-bay","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Piedmont city\" (0.71 km); 2020 population vs Census PL 94-171 POP100 (11270); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.81667,"lon":-122.23333,"category":"city","toleranceKm":2,"hint":"Alameda County; a city completely surrounded by Oakland."},{"id":"bay-canyon","name":"Canyon","tier":5,"explanation":"Canyon is a tiny unincorporated community tucked into a redwood canyon between Oakland and Moraga, near the Contra Costa-Alameda county line, with homes strung along Pinehurst Road and steep private footpaths. Once called Sequoya and The Redwoods, it has decorated a memorial Christmas tree every year since 1971.","sources":["wp-canyon","usgs-gnis-ca"],"tags":["east-bay","contra-costa-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.38 km), Wikidata P625 (2.01 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)","note":"GNIS lists Canyon under Alameda County, but the cited article, the Nominatim reverse geocode of this point (\"Canyon, Contra Costa County\") and the 94516 post office place it in Contra Costa; county line runs along the adjacent ridge."}],"kind":"place","map":"bay","lat":37.83389,"lon":-122.16503,"category":"town","toleranceKm":3,"hint":"Contra Costa County; a hidden redwood hamlet behind the Oakland hills."},{"id":"bay-alviso","name":"Alviso","tier":5,"explanation":"Alviso was the shipping port for the Santa Clara Valley at the southern tip of San Francisco Bay and became California's first chartered city in 1852, before voters consolidated it with San Jose in 1968. At 13 feet below sea level it is the lowest point in the Bay Area, surrounded by salt ponds.","sources":["wp-alviso-san-jose","usgs-gnis-ca"],"tags":["south-bay","santa-clara-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.77 km), Wikidata P625 (0 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.425,"lon":-121.96667,"category":"town","toleranceKm":3,"hint":"Santa Clara County; former port at the Bay's southern tip, now part of San Jose."},{"id":"bay-guerneville","name":"Guerneville","tier":5,"explanation":"Guerneville is a resort town on the Russian River in Sonoma County, next to the Armstrong Redwoods reserve. Founded by the Guerne family in the 1850s as a logging community, it was revived in the late 1970s as a weekend destination for gay San Franciscans; it had 4,552 residents in 2020.","sources":["wp-guerneville","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Guerneville CDP\" (1.2 km); 2020 population vs Census PL 94-171 POP100 (4552); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.50639,"lon":-122.99083,"category":"town","hint":"Sonoma County; Russian River resort town beside Armstrong Redwoods."},{"id":"bay-bodega-bay","name":"Bodega Bay","tier":5,"explanation":"A fishing village on the Sonoma County coast with 912 residents in 2020, Bodega Bay was the main location for Alfred Hitchcock's 1963 film 'The Birds'. It sits at the mouth of a harbor sheltered by Bodega Head.","sources":["wp-bodega-bay","census-2020-pl-ca","census-gazetteer-2023-ca-places"],"tags":["north-bay","sonoma-county","coast"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Census 2023 Gazetteer internal point for \"Bodega Bay CDP\" (0.83 km); 2020 population vs Census PL 94-171 POP100 (912); every claim re-read in cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.32444,"lon":-123.03861,"category":"town","hint":"Sonoma County; fishing village where Hitchcock filmed 'The Birds'."},{"id":"bay-angel-island","name":"Angel Island","tier":2,"explanation":"The largest natural island in San Francisco Bay, Angel Island in Marin County held the immigration station that detained and inspected roughly a million immigrants, mostly from Asia, between 1910 and 1940. Now a state park, it rises to 788 feet at Mount Caroline Livermore.","sources":["wp-angel-island-california","ca-parks-angel-island","usgs-gnis-ca"],"tags":["island","marin-county","state-park"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.34 km), Wikidata P625 (0 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.86,"lon":-122.43,"category":"island","toleranceKm":4,"elevationFt":788,"hint":"Marin County; the largest natural island in the Bay."},{"id":"bay-alcatraz","name":"Alcatraz","tier":1,"explanation":"Alcatraz holds the oldest operating lighthouse on the West Coast and was a military fort and prison before becoming a federal penitentiary from 1934 to 1963. Native American activists occupied the island from 1969 to 1971; it is now part of the Golden Gate National Recreation Area.","sources":["wp-alcatraz-island","usgs-gnis-ca"],"tags":["island","san-francisco","nps"],"aliases":["Alcatraz Island","The Rock"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.01 km), Wikidata P625 (0.01 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.82667,"lon":-122.42278,"category":"island","toleranceKm":4,"hint":"San Francisco; 'The Rock', former federal penitentiary."},{"id":"bay-treasure-island","name":"Treasure Island","tier":2,"explanation":"Treasure Island is an artificial island built in the 1930s for the 1939 Golden Gate International Exposition, then used as a naval station until 1997. Attached to Yerba Buena Island and part of the City of San Francisco, it is now being redeveloped into a new neighborhood.","sources":["wp-treasure-island-san-francisco"],"tags":["island","san-francisco"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (0.09 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.825,"lon":-122.371,"category":"island","toleranceKm":1.5,"hint":"San Francisco; artificial island built for the 1939 world's fair."},{"id":"bay-yerba-buena-island","name":"Yerba Buena Island","tier":3,"explanation":"The natural island in the middle of the Bay Bridge, Yerba Buena Island carries the tunnel that links the bridge's two halves. Once called Goat Island, it is attached to artificial Treasure Island and its lighthouse has been run by the Coast Guard since 1939.","sources":["wp-yerba-buena-island","usgs-gnis-ca"],"tags":["island","san-francisco"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.01 km), Wikidata P625 (0.01 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.80991,"lon":-122.366,"category":"island","toleranceKm":1.2,"hint":"San Francisco; the natural island the Bay Bridge tunnels through."},{"id":"bay-mount-tamalpais","name":"Mount Tamalpais","tier":1,"explanation":"Marin County's signature peak rises 2,571 feet at East Peak above Mill Valley and the Pacific, its ridgeline nicknamed the 'Sleeping Lady'. Its fire roads are where mountain biking was pioneered in the 1970s, and a stone amphitheater near the summit hosts the Mountain Play.","sources":["wp-mount-tamalpais","usgs-epqs","usgs-gnis-ca"],"tags":["mountain","marin-county","state-park"],"aliases":["Mt. Tam","Mount Tam"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (1.76 km), Wikidata P625 (0.01 km), USGS 3DEP DEM elevation sampled around summit; every claim re-read in cited source text (fetched 2026-11-01)","note":"GNIS \"Mount Tamalpais\" summit point is West Peak, 1.8 km away; this item deliberately uses East Peak (the public summit)."}],"kind":"place","map":"bay","lat":37.92909,"lon":-122.57783,"category":"mountain","toleranceKm":3,"elevationFt":2571,"hint":"Marin County; the 'Sleeping Lady' peak above Mill Valley."},{"id":"bay-mount-diablo","name":"Mount Diablo","tier":1,"explanation":"The 3,849-foot summit of Mount Diablo in Contra Costa County is an isolated upthrust peak visible from most of the Bay Area, and on clear days the Sierra Nevada can be seen from its top. Its summit is the initial point of the Mount Diablo Meridian, the base for land surveys across much of California and Nevada.","sources":["wp-mount-diablo","usgs-gnis-ca"],"tags":["mountain","contra-costa-county","state-park"],"aliases":["Mt. Diablo"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.01 km), Wikidata P625 (0 km), USGS 3DEP DEM elevation sampled around summit; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.8817,"lon":-121.91415,"category":"mountain","toleranceKm":4,"elevationFt":3849,"hint":"Contra Costa County; the isolated 3,849-foot peak east of Walnut Creek."},{"id":"bay-mount-hamilton","name":"Mount Hamilton","tier":2,"explanation":"At roughly 4,200 feet, Mount Hamilton in Santa Clara County's Diablo Range looks down on the whole Santa Clara Valley. Its summit holds Lick Observatory, the world's first permanently occupied mountaintop observatory, whose great refractor saw first light in 1888 above the grave of benefactor James Lick.","sources":["wp-mount-hamilton-california","wp-lick-observatory","usgs-epqs","usgs-gnis-ca"],"tags":["mountain","santa-clara-county"],"aliases":["Lick Observatory"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.01 km), Wikidata P625 (0.01 km), USGS 3DEP DEM elevation sampled around summit; every claim re-read in cited source text (fetched 2026-11-01)","note":"Elevation hedged to ~4,200 ft; see change log."}],"kind":"place","map":"bay","lat":37.34172,"lon":-121.64283,"category":"mountain","toleranceKm":4,"elevationFt":4217,"hint":"Santa Clara County; the Diablo Range peak crowned by Lick Observatory."},{"id":"bay-point-reyes","name":"Point Reyes","tier":2,"explanation":"The Point Reyes headland in Marin County juts into the Pacific; Juan Rodríguez Cabrillo sighted and named it in 1542 yet missed the entrance to San Francisco Bay, which Europeans did not find until 1769. Its lighthouse, first lit in 1870, was built low on the cliff to sit beneath the fog, and the peninsula has been protected as Point Reyes National Seashore since 1962.","sources":["wp-point-reyes","wp-point-reyes-lighthouse","wp-pacifica","usgs-gnis-ca"],"tags":["coast","marin-county","nps"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (2.08 km), Wikidata P625 (0.02 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.997,"lon":-123.02,"category":"landmark","hint":"Marin County; the windswept headland at the tip of the National Seashore."},{"id":"bay-golden-gate-bridge","name":"Golden Gate Bridge","tier":1,"explanation":"Opened in 1937, the Golden Gate Bridge spans the strait between San Francisco and Marin County with a 4,200-foot main span that was the world's longest for a suspension bridge until 1964. Its color is officially International Orange, and chief engineer Joseph Strauss led the project.","sources":["wp-golden-gate-bridge"],"tags":["bridge","san-francisco","marin-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (0 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.81972,"lon":-122.47861,"category":"bridge","toleranceKm":3,"hint":"Links San Francisco to Marin across the Golden Gate strait."},{"id":"bay-bay-bridge","name":"Bay Bridge","tier":1,"explanation":"The Bay Bridge opened in November 1936, six months before the Golden Gate Bridge, as two bridges joined by a tunnel through Yerba Buena Island. A section of the eastern span collapsed in the 1989 Loma Prieta earthquake; a new self-anchored suspension eastern span replaced it in 2013.","sources":["wp-san-francisco-oakland-bay-bridge"],"tags":["bridge","san-francisco","alameda-county"],"aliases":["San Francisco–Oakland Bay Bridge","San Francisco-Oakland Bay Bridge"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (0 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.81806,"lon":-122.34667,"category":"bridge","toleranceKm":4,"hint":"Links San Francisco to Oakland via Yerba Buena Island (pin the eastern span)."},{"id":"bay-richmond-san-rafael-bridge","name":"Richmond–San Rafael Bridge","tier":3,"explanation":"The Richmond–San Rafael Bridge carries Interstate 580 across the northern Bay between Contra Costa and Marin counties. Opened in 1956, its double-decked cantilever structure replaced the Richmond–San Rafael ferry; it was the last bridge built across the Bay to replace a ferry service.","sources":["wp-richmond-san-rafael-bridge"],"tags":["bridge","contra-costa-county","marin-county"],"aliases":["Richmond-San Rafael Bridge"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (1.22 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.9347,"lon":-122.4338,"category":"bridge","toleranceKm":4,"hint":"Carries I-580 across the north Bay from Contra Costa to Marin."},{"id":"bay-san-mateo-hayward-bridge","name":"San Mateo–Hayward Bridge","tier":3,"explanation":"Carrying State Route 92 between Foster City on the Peninsula and Hayward in the East Bay, the San Mateo–Hayward Bridge is California's longest fixed-link bridge at seven miles. The current high-rise span opened in 1967, replacing a 1929 bridge.","sources":["wp-san-mateo-hayward-bridge"],"tags":["bridge","san-mateo-county","alameda-county"],"aliases":["San Mateo-Hayward Bridge","San Mateo Bridge"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (3.56 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.6019,"lon":-122.2047,"category":"bridge","toleranceKm":4,"hint":"Carries Highway 92 across the Bay between San Mateo and Hayward."},{"id":"bay-dumbarton-bridge","name":"Dumbarton Bridge","tier":3,"explanation":"The southernmost crossing of San Francisco Bay, the Dumbarton Bridge carries State Route 84 between Menlo Park and Fremont. The original 1927 bridge was the first vehicular bridge to cross the Bay; the current span opened in 1982.","sources":["wp-dumbarton-bridge-california"],"tags":["bridge","san-mateo-county","alameda-county"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (0 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.5069,"lon":-122.1169,"category":"bridge","toleranceKm":4,"hint":"The southernmost Bay crossing, between Menlo Park and Fremont."},{"id":"bay-carquinez-bridge","name":"Carquinez Bridge","tier":3,"explanation":"The Carquinez Bridge is a pair of parallel spans carrying Interstate 80 across the Carquinez Strait between Crockett and Vallejo. The Alfred Zampa Memorial Bridge, a suspension span opened in 2003 that carries traffic from Vallejo toward Crockett, honors an iron worker who helped build many of the Bay Area's bridges.","sources":["wp-carquinez-bridge"],"tags":["bridge","contra-costa-county","solano-county"],"aliases":["Al Zampa Memorial Bridge"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (0.01 km), Nominatim reverse geocode confirms point is on the feature; every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.0608,"lon":-122.2257,"category":"bridge","toleranceKm":4,"hint":"Carries I-80 across the Carquinez Strait between Crockett and Vallejo."},{"id":"bay-farallon-islands","name":"Farallon Islands","tier":2,"explanation":"The Farallon Islands lie about 30 miles outside the Golden Gate yet are legally part of the City and County of San Francisco. A national wildlife refuge closed to the public, they hold the largest seabird colony in the United States outside Alaska and Hawaii and are a seasonal haunt of great white sharks.","sources":["wp-farallon-islands","usgs-gnis-ca"],"tags":["island","san-francisco","coast"],"aliases":["Farallones","The Farallones"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (1.00 km), Wikidata P625 (3.56 km); every claim re-read in cited source text (fetched 2026-11-01)","note":"Point lies on Middle Farallon; main Southeast Farallon Island is ~4 km SE, inside the 6 km default tolerance."}],"kind":"place","map":"bay","lat":37.72493,"lon":-123.03028,"category":"island","hint":"San Francisco; the rocky islands about 30 miles out to sea."},{"id":"bay-sfo","name":"San Francisco International Airport","tier":2,"explanation":"The Bay Area's largest airport sits on the Bay shore in unincorporated San Mateo County, owned and operated by the City and County of San Francisco. It opened in 1927 as Mills Field Municipal Airport on land leased from the Mills estate.","sources":["wp-san-francisco-international-airport"],"tags":["airport","san-mateo-county"],"aliases":["SFO"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs Wikidata P625 (0 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":37.61889,"lon":-122.375,"category":"landmark","toleranceKm":3,"hint":"San Mateo County; the Bay Area's main airport, on the Bay about 12 miles south of SF."},{"id":"bay-san-pablo-bay","name":"San Pablo Bay","tier":3,"explanation":"San Pablo Bay is the mostly shallow northern extension of San Francisco Bay, with a dredged deep-water channel down its middle. The Petaluma River and Sonoma Creek flow into it directly, the Napa River enters near the Carquinez Strait, and the strait carries it east to Suisun Bay.","sources":["wp-san-pablo-bay","usgs-gnis-ca"],"tags":["bay","north-bay"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.10 km), Wikidata P625 (2.54 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.06667,"lon":-122.38333,"category":"bay","hint":"The broad, shallow northern lobe of San Francisco Bay."},{"id":"bay-suisun-bay","name":"Suisun Bay","tier":4,"explanation":"Suisun Bay is the easternmost arm of the San Francisco Bay estuary, where the Sacramento and San Joaquin rivers arrive from the Delta. For decades it was the anchorage of the Suisun Bay Reserve Fleet, the Navy's so-called Mothball or Ghost Fleet of retired ships.","sources":["wp-suisun-bay","usgs-gnis-ca"],"tags":["bay","north-bay","delta"],"verification":[{"by":"author:bay-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:bay-check","date":"2026-11-01","method":"coords vs USGS GNIS (0.00 km), Wikidata P625 (0 km); every claim re-read in cited source text (fetched 2026-11-01)"}],"kind":"place","map":"bay","lat":38.0638,"lon":-121.9927,"category":"bay","hint":"The easternmost bay, where the Delta rivers meet tidewater."}]},{"id":"ca-formation","title":"How California Came to Be","subtitle":"Explorers, missions, bear flags and a golden state","description":"How California was explored, colonized, seized and admitted to the Union, and the laws, symbols and infrastructure that defined the state afterward.","order":70,"accent":"sand","sources":[{"id":"wp-indigenous-ca","title":"Indigenous peoples of California","url":"https://en.wikipedia.org/wiki/Indigenous_peoples_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"~340,000 people in 1769 per widely accepted estimates; ten language families, 78+ languages; ~16,000 by 1900; 109 federally recognized tribes."},{"id":"pbs-socal-ca-indians","title":"Untold History: The Survival of California's Indians","url":"https://pbssocal.org/shows/tending-the-wild/untold-history-the-survival-of-californias-indians","publisher":"PBS SoCal","accessed":"2026-11-01","note":"Scholarly consensus of 100,000-300,000 before contact; ~100 languages."},{"id":"wp-cabrillo","title":"Juan Rodríguez Cabrillo","url":"https://en.wikipedia.org/wiki/Juan_Rodr%C3%ADguez_Cabrillo","publisher":"Wikipedia","accessed":"2026-11-01","note":"Landed in San Diego Bay Sept 28, 1542; named it San Miguel; died Jan 3, 1543."},{"id":"nps-cabrillo","title":"Juan Rodriguez Cabrillo","url":"https://www.nps.gov/cabr/learn/historyculture/juan-rodriguez-cabrillo.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Entered the bay 103 days into the voyage that left June 27, 1542; named it San Miguel; died Jan 3, 1543."},{"id":"wp-new-albion","title":"New Albion","url":"https://en.wikipedia.org/wiki/New_Albion","publisher":"Wikipedia","accessed":"2026-11-01","note":"Drake landed June 17, 1579 and left July 23; Drakes Bay, Point Reyes."},{"id":"wp-drakes-bay","title":"Drakes Bay","url":"https://en.wikipedia.org/wiki/Drakes_Bay","publisher":"Wikipedia","accessed":"2026-11-01","note":"Believed site of Drake's 1579 landfall, which he called New Albion."},{"id":"wp-monterey-ca","title":"Monterey, California","url":"https://en.wikipedia.org/wiki/Monterey,_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Vizcaíno anchored and named Monterey Dec 16, 1602; Portolá and Serra founded presidio and mission June 3, 1770."},{"id":"mchs-vizcaino","title":"Sebastián Vizcaíno","url":"https://mchsmuseum.com/local-history/early-explorations/sebastian-vizcaino/","publisher":"Monterey County Historical Society","accessed":"2026-11-01","note":"Entered Monterey Bay Dec 16, 1602; named for the Count of Monterrey."},{"id":"wp-mission-san-diego","title":"Mission San Diego de Alcalá","url":"https://en.wikipedia.org/wiki/Mission_San_Diego_de_Alcal%C3%A1","publisher":"Wikipedia","accessed":"2026-11-01","note":"Founded July 16, 1769 by Serra; first of 21."},{"id":"cmf-mission-san-diego","title":"Mission San Diego de Alcalá","url":"https://californiamissionsfoundation.org/mission-san-diego/","publisher":"California Missions Foundation","accessed":"2026-11-01","note":"Founded July 16, 1769; first of the 21 missions."},{"id":"wp-spanish-missions-ca","title":"Spanish missions in California","url":"https://en.wikipedia.org/wiki/Spanish_missions_in_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"21 missions, 1769-1823; El Camino Real; secularized 1833."},{"id":"wp-mission-solano","title":"Mission San Francisco Solano (California)","url":"https://en.wikipedia.org/wiki/Mission_San_Francisco_Solano_(California)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Founded July 4, 1823 by Altimira; 21st and last; only one under Mexican rule."},{"id":"cmf-mission-solano","title":"Mission San Francisco Solano","url":"https://californiamissionsfoundation.org/mission-san-francisco-solano/","publisher":"California Missions Foundation","accessed":"2026-11-01","note":"Founded July 4, 1823; 21st and last mission."},{"id":"wp-el-camino-real","title":"El Camino Real (California)","url":"https://en.wikipedia.org/wiki/El_Camino_Real_(California)","publisher":"Wikipedia","accessed":"2026-11-01","note":"~600-mile commemorative route linking 21 missions, 4 presidios, 3 pueblos; first bell Aug 15, 1906."},{"id":"wp-fort-ross","title":"Fort Ross, California","url":"https://en.wikipedia.org/wiki/Fort_Ross,_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Kuskov arrived March 1812; fortress dedicated Sept 11, 1812; sold to Sutter Dec 1841."},{"id":"parks-fort-ross","title":"Fort Ross State Historic Park","url":"https://www.parks.ca.gov/?page_id=449","publisher":"California State Parks","accessed":"2026-11-01","note":"Founded 1812 by the Russian-American Company as an agricultural base for Alaska; Russian period 1812-1841."},{"id":"wp-alta-california","title":"Alta California","url":"https://en.wikipedia.org/wiki/Alta_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Separate province from 1804; Mexican independence Aug 24, 1821; Californios joined Mexico April 1822; hides and tallow the main exports."},{"id":"wp-mexican-independence","title":"Mexican War of Independence","url":"https://en.wikipedia.org/wiki/Mexican_War_of_Independence","publisher":"Wikipedia","accessed":"2026-11-01","note":"War ended Sept 27, 1821; declaration Sept 28, 1821."},{"id":"wp-secularization","title":"Mexican secularization act of 1833","url":"https://en.wikipedia.org/wiki/Mexican_secularization_act_of_1833","publisher":"Wikipedia","accessed":"2026-11-01","note":"Decree of Aug 17, 1833; most land went to Californios rather than Native people."},{"id":"wp-ranchos","title":"Ranchos of California","url":"https://en.wikipedia.org/wiki/Ranchos_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Cattle raised for hides and tallow; league ~4,428 acres; Land Act of 1851."},{"id":"wp-california-republic","title":"California Republic","url":"https://en.wikipedia.org/wiki/California_Republic","publisher":"Wikipedia","accessed":"2026-11-01","note":"Bear Flag raised at Sonoma June 14, 1846; ended July 9, 1846; 25 days."},{"id":"wp-conquest-california","title":"Conquest of California","url":"https://en.wikipedia.org/wiki/Conquest_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Bear Flag Revolt June 14, 1846; Sloat at Monterey July 7; Treaty of Cahuenga Jan 13, 1847."},{"id":"parks-sonoma-shp","title":"Sonoma State Historic Park","url":"https://www.parks.ca.gov/?page_id=479","publisher":"California State Parks","accessed":"2026-11-01","note":"Birthplace of the California Bear Flag; mission and Vallejo home."},{"id":"wp-donner-party","title":"Donner Party","url":"https://en.wikipedia.org/wiki/Donner_Party","publisher":"Wikipedia","accessed":"2026-11-01","note":"Snowbound at Truckee Lake from Nov 4, 1846; first relief Feb 18, 1847; 87 entered the Wasatch, 48 survived."},{"id":"history-donner","title":"Donner Party","url":"https://www.history.com/topics/westward-expansion/donner-party","publisher":"HISTORY","accessed":"2026-11-01","note":"Trapped by late-October 1846 snow; 45 of 89 reached California."},{"id":"wp-gold-rush","title":"California Gold Rush","url":"https://en.wikipedia.org/wiki/California_Gold_Rush","publisher":"Wikipedia","accessed":"2026-11-01","note":"Marshall found gold Jan 24, 1848 at Coloma; ~300,000 arrivals by 1855."},{"id":"ohp-chl-530","title":"California Historical Landmark: Gold Discovery Site","url":"https://ohp.parks.ca.gov/ListedResources/Detail/530","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Jan 24, 1848, tailrace of Sutter's sawmill, Coloma."},{"id":"wp-treaty-gh","title":"Treaty of Guadalupe Hidalgo","url":"https://en.wikipedia.org/wiki/Treaty_of_Guadalupe_Hidalgo","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed Feb 2, 1848; Senate ratified March 10; $15 million; border one league south of San Diego Bay."},{"id":"archives-treaty-gh","title":"Treaty of Guadalupe Hidalgo (1848)","url":"https://www.archives.gov/milestone-documents/treaty-of-guadalupe-hidalgo","publisher":"US National Archives","accessed":"2026-11-01","note":"Signed Feb 2, 1848; ~525,000 sq mi; $15 million."},{"id":"wp-adams-onis","title":"Adams-Onís Treaty","url":"https://en.wikipedia.org/wiki/Adams%E2%80%93On%C3%ADs_Treaty","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed Feb 22, 1819; boundary along the 42nd parallel to the Pacific; in force 1821."},{"id":"state-dept-adams-onis","title":"Acquisition of Florida: Treaty of Adams-Onis (1819)","url":"https://history.state.gov/milestones/1801-1829/florida","publisher":"US Department of State, Office of the Historian","accessed":"2026-11-01","note":"Signed Feb 22, 1819; Spain gave up Pacific Northwest claims; 42nd parallel."},{"id":"wp-colton-hall","title":"Colton Hall","url":"https://en.wikipedia.org/wiki/Colton_Hall","publisher":"Wikipedia","accessed":"2026-11-01","note":"48 delegates met Sept 1 to Oct 1849 in Monterey; constitution signed Oct 13; San Jose chosen as first seat of the Legislature."},{"id":"ebsco-ca-admitted","title":"California Admitted to the Union","url":"https://www.ebsco.com/research-starters/history/california-admitted-union","publisher":"EBSCO Research Starters","accessed":"2026-11-01","note":"Admitted Sept 9, 1850 as a free state under the Compromise of 1850; Monterey convention Sept 1849."},{"id":"wp-compromise-1850","title":"Compromise of 1850","url":"https://en.wikipedia.org/wiki/Compromise_of_1850","publisher":"Wikipedia","accessed":"2026-11-01","note":"California admitted as a free state Sept 9, 1850; Clay and Douglas; Fugitive Slave Act."},{"id":"ca-gov-admission-day","title":"Governor Brown Issues Proclamation Declaring Admission Day (2011)","url":"https://archive.gov.ca.gov/archive/gov39/2011/09/09/news17205/index.html","publisher":"Office of the Governor of California","accessed":"2026-11-01","note":"Sept 9, 1850; 31st state; Compromise of 1850."},{"id":"wp-sacramento","title":"Sacramento, California","url":"https://en.wikipedia.org/wiki/Sacramento,_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Permanent capital from 1854 after San Jose, Vallejo and Benicia."},{"id":"capitolmuseum-capitals","title":"Capital or Capitol? California's capital cities","url":"https://capitolmuseum.ca.gov/?p=51938","publisher":"California State Capitol Museum","accessed":"2026-11-01","note":"San Jose Dec 15, 1849-May 1, 1851; Vallejo 1852 and 1853; Benicia Feb 11, 1853-Feb 25, 1854; Sacramento permanent from Feb 1854."},{"id":"wp-pony-express","title":"Pony Express","url":"https://en.wikipedia.org/wiki/Pony_Express","publisher":"Wikipedia","accessed":"2026-11-01","note":"April 3, 1860 to Oct 26, 1861; St. Joseph to Sacramento; ~1,900 miles in ~10 days."},{"id":"nps-pony-express","title":"Pony Express National Historic Trail: History & Culture","url":"https://www.nps.gov/poex/learn/historyculture/index.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"April 1860 to October 1861; 1,800+ miles in 10 days; ended when the telegraph connected."},{"id":"wp-telegraph","title":"First transcontinental telegraph","url":"https://en.wikipedia.org/wiki/First_transcontinental_telegraph","publisher":"Wikipedia","accessed":"2026-11-01","note":"Completed Oct 24, 1861 at Salt Lake City; Field's message to Lincoln; Pony Express closed two days later."},{"id":"history-telegraph","title":"Western Union completes the first transcontinental telegraph line","url":"https://www.history.com/this-day-in-history/October-24/western-union-completes-the-first-transcontinental-telegraph-line","publisher":"HISTORY","accessed":"2026-11-01","note":"Oct 24, 1861; Salt Lake City; Stephen Field to Lincoln."},{"id":"wp-yosemite-grant","title":"Yosemite Grant","url":"https://en.wikipedia.org/wiki/Yosemite_Grant","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed by Lincoln June 30, 1864; Yosemite Valley and Mariposa Grove to California; first federal land set aside for preservation."},{"id":"wp-yosemite-np","title":"Yosemite National Park","url":"https://en.wikipedia.org/wiki/Yosemite_National_Park","publisher":"Wikipedia","accessed":"2026-11-01","note":"Established Oct 1, 1890; Valley and Grove returned to federal control 1906."},{"id":"nps-yosemite-history","title":"Yosemite National Park: History & Culture","url":"https://www.nps.gov/yose/learn/historyculture/index.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Grant June 30, 1864; park Oct 1, 1890; 1906 recession; Raker Act 1913."},{"id":"wp-railroad","title":"First transcontinental railroad","url":"https://en.wikipedia.org/wiki/First_transcontinental_railroad","publisher":"Wikipedia","accessed":"2026-11-01","note":"Last Spike May 10, 1869 at Promontory Summit; Central Pacific from Sacramento; Big Four; Chinese laborers."},{"id":"nps-golden-spike","title":"Golden Spike National Historical Park: History & Culture","url":"https://www.nps.gov/gosp/learn/historyculture/index.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Locomotives met May 10, 1869 at Promontory."},{"id":"stanford-crw-faq","title":"Chinese Railroad Workers in North America Project: FAQs","url":"https://chineserailroadworkers.stanford.edu/faqs/","publisher":"Stanford University","accessed":"2026-11-01","note":"10,000-15,000 Chinese workers at any time; ~90% of the Central Pacific workforce by 1867."},{"id":"wp-big-four","title":"The Big Four (Central Pacific Railroad)","url":"https://en.wikipedia.org/wiki/The_Big_Four_(Central_Pacific_Railroad)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Stanford, Huntington, Hopkins, Crocker; Nob Hill mansions."},{"id":"wp-ca-constitution","title":"Constitution of California","url":"https://en.wikipedia.org/wiki/Constitution_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Adopted at Monterey 1849; second constitution ratified May 7, 1879."},{"id":"joincalifornia-1879","title":"May 7, 1879 special election","url":"https://www.joincalifornia.com/election/1879-05-07","publisher":"JoinCalifornia election archive","accessed":"2026-11-01","note":"Second constitution ratified 77,959 to 67,134."},{"id":"wp-sierra-club","title":"Sierra Club","url":"https://en.wikipedia.org/wiki/Sierra_Club","publisher":"Wikipedia","accessed":"2026-11-01","note":"Founded May 28, 1892 in San Francisco; Muir first president; lost the Hetch Hetchy fight in 1913."},{"id":"wp-suffrage-ca","title":"Women's suffrage in California","url":"https://en.wikipedia.org/wiki/Women%27s_suffrage_in_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Proposition 4 approved Oct 10, 1911 by 3,587 votes; 1896 attempt failed."},{"id":"sos-suffrage-1911","title":"Secretary of State news release DB11-041 (2011)","url":"https://www.sos.ca.gov/administration/news-releases-and-advisories/2011-news-releases-and-advisories/db11-041","publisher":"California Secretary of State","accessed":"2026-11-01","note":"Oct 10, 1911 special election; won by 3,587 votes; sixth state."},{"id":"wp-flag-ca","title":"Flag of California","url":"https://en.wikipedia.org/wiki/Flag_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Adopted Feb 3, 1911; star from the 1836 Lone Star flag; bear standardized 1953; 1846 original burned in 1906."},{"id":"capitolmuseum-flag","title":"State Flag","url":"https://capitolmuseum.ca.gov/state-symbols/flag/","publisher":"California State Capitol Museum","accessed":"2026-11-01","note":"Adopted 1911; from the 1846 Bear Flag Revolt; bear from a Charles Nahl painting."},{"id":"wp-great-seal","title":"Great Seal of California","url":"https://en.wikipedia.org/wiki/Great_Seal_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Adopted 1849; Minerva, grizzly, miner, ships, Sierra Nevada, 31 stars, Eureka."},{"id":"capitolmuseum-seal","title":"Great Seal","url":"https://capitolmuseum.ca.gov/state-symbols/seal/","publisher":"California State Capitol Museum","accessed":"2026-11-01","note":"Approved at the 1849 Monterey convention; 31 stars; Eureka."},{"id":"capitolmuseum-motto","title":"State Motto: Eureka","url":"https://capitolmuseum.ca.gov/state-symbols/motto-eureka/","publisher":"California State Capitol Museum","accessed":"2026-11-01","note":"Chosen for the 1849 seal; official state motto 1963."},{"id":"wp-ca-grizzly","title":"California grizzly bear","url":"https://en.wikipedia.org/wiki/California_grizzly_bear","publisher":"Wikipedia","accessed":"2026-11-01","note":"Last hunted bear shot in Tulare County August 1922; last sighting 1924; state animal 1953."},{"id":"capitolmuseum-grizzly","title":"State Animal: California Grizzly Bear","url":"https://capitolmuseum.ca.gov/state-symbols/state-animal-grizzly-bear/","publisher":"California State Capitol Museum","accessed":"2026-11-01","note":"State animal 1953; extinct in California by the 1920s."},{"id":"wp-etymology-ca","title":"Etymology of California","url":"https://en.wikipedia.org/wiki/Etymology_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"From the island of California in Montalvo's Las sergas de Esplandián (c. 1510), ruled by Queen Calafia; applied to Baja in the 1530s."},{"id":"usc-ca-name","title":"How California (Probably) Got Its Name","url":"https://dornsife.usc.edu/magazine/how-california-got-its-name/","publisher":"USC Dornsife Magazine","accessed":"2026-11-01","note":"Calafia's island in Montalvo's novel is the leading theory; 'hot furnace' and Indigenous-origin theories are alternatives."},{"id":"wp-hollywood","title":"Hollywood, Los Angeles","url":"https://en.wikipedia.org/wiki/Hollywood,_Los_Angeles","publisher":"Wikipedia","accessed":"2026-11-01","note":"Annexed Feb 7, 1910; Nestor set up at Sunset and Gower in Oct 1911 (first-studio claim is disputed)."},{"id":"moviestudios-nestor","title":"Nestor Studios: Hollywood's First Studio","url":"https://themoviestudios.com/?p=3764","publisher":"The Movie Studios","accessed":"2026-11-01","note":"David Horsley arrived Oct 27, 1911 and leased Blondeau's Tavern for Nestor Studios."},{"id":"wp-bracero","title":"Bracero Program","url":"https://en.wikipedia.org/wiki/Bracero_Program","publisher":"Wikipedia","accessed":"2026-11-01","note":"Agreement Aug 4, 1942; ended 1964; ~4.6 million contracts; began at Stockton."},{"id":"bracero-archive","title":"About the Bracero History Archive","url":"https://braceroarchive.org/about","publisher":"Bracero History Archive","accessed":"2026-11-01","note":"Agreement signed Aug 4, 1942; 1942-1964; ~4.6 million contracts."},{"id":"wp-eo-9066","title":"Executive Order 9066","url":"https://en.wikipedia.org/wiki/Executive_Order_9066","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed Feb 19, 1942; ~112,000-125,000 removed; rescinded Feb 19, 1976; Civil Liberties Act Aug 10, 1988."},{"id":"archives-eo-9066","title":"Executive Order 9066 (1942)","url":"https://www.archives.gov/milestone-documents/executive-order-9066","publisher":"US National Archives","accessed":"2026-11-01","note":"Signed Feb 19, 1942; ~122,000 removed; 1988 redress."},{"id":"wp-prop-14","title":"1964 California Proposition 14","url":"https://en.wikipedia.org/wiki/1964_California_Proposition_14","publisher":"Wikipedia","accessed":"2026-11-01","note":"Nov 3, 1964; 65.39% yes; nullified the Rumford Fair Housing Act; struck down in Mulkey v. Reitman (1966) and Reitman v. Mulkey (1967)."},{"id":"wp-silicon-valley","title":"Silicon Valley","url":"https://en.wikipedia.org/wiki/Silicon_Valley","publisher":"Wikipedia","accessed":"2026-11-01","note":"Don Hoefler's 'Silicon Valley U.S.A.' in Electronic News, Jan 11, 1971."},{"id":"chm-silicon-valley-name","title":"Who named Silicon Valley?","url":"https://computerhistory.org/blog/who-named-silicon-valley/","publisher":"Computer History Museum","accessed":"2026-11-01","note":"Hoefler's article dated Jan 11, 1971; Vaerst credited by many for suggesting the name."},{"id":"wp-prop-13","title":"1978 California Proposition 13","url":"https://en.wikipedia.org/wiki/1978_California_Proposition_13","publisher":"Wikipedia","accessed":"2026-11-01","note":"1% cap and 2% annual limit; two-thirds vote for special taxes."},{"id":"hjta-prop-13","title":"Proposition 13","url":"https://www.hjta.org/propositions/proposition-13/","publisher":"Howard Jarvis Taxpayers Association","accessed":"2026-11-01","note":"Passed June 6, 1978 by nearly two-thirds; cut property taxes ~57%."},{"id":"wp-la-aqueduct","title":"Los Angeles Aqueduct","url":"https://en.wikipedia.org/wiki/Los_Angeles_Aqueduct","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened November 1913 (Cascades completed Nov 5, 1913); 233 miles from the Owens River."},{"id":"ladwp-aqueduct","title":"Los Angeles Aqueduct","url":"https://www.ladwp.com/who-we-are/water-system/los-angeles-aqueduct","publisher":"LADWP","accessed":"2026-11-01","note":"Built in 1913."},{"id":"wp-raker-act","title":"Raker Act","url":"https://en.wikipedia.org/wiki/Raker_Act","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed Dec 19, 1913 by Wilson; authorized O'Shaughnessy Dam in Yosemite."},{"id":"archives-raker-act","title":"H.R. 7207, the Raker Act","url":"https://www.archives.gov/legislative/features/hetch-hetchy/hr7207.html","publisher":"US National Archives, Center for Legislative Archives","accessed":"2026-11-01","note":"Signed Dec 19, 1913."},{"id":"wp-pop-history-americas","title":"Population history of Indigenous peoples of the Americas","url":"https://en.wikipedia.org/wiki/Population_history_of_Indigenous_peoples_of_the_Americas","publisher":"Wikipedia","accessed":"2026-11-01","note":"Table: California Native tribes 340,000 in 1769 (Cook; Jones & Codding)."},{"id":"sdmaritime-san-salvador","title":"San Salvador","url":"https://sdmaritime.org/visit/the-ships/san-salvador/","publisher":"Maritime Museum of San Diego","accessed":"2026-11-01","note":"Cabrillo arrived at San Diego September 28, 1542."},{"id":"wp-drake-in-california","title":"Drake in California","url":"https://en.wikipedia.org/wiki/Drake_in_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Crew careened the ship and spent five weeks repairing it."},{"id":"wp-monterey-bay","title":"Monterey Bay","url":"https://en.wikipedia.org/wiki/Monterey_Bay","publisher":"Wikipedia","accessed":"2026-11-01","note":"Vizcaíno entered and named the bay on December 16, 1602."},{"id":"ohp-chl-242","title":"Mission San Diego de Alcalá (CHL 242)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/242","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Cross raised Sunday, July 16, 1769; Alta California's first mission."},{"id":"ohp-chl-3","title":"Mission San Francisco Solano (CHL 3)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/3","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Founded July 4, 1823 by Altimira; northernmost; only mission under independent Mexico."},{"id":"wp-kuskov","title":"Ivan Kuskov","url":"https://en.wikipedia.org/wiki/Ivan_Kuskov","publisher":"Wikipedia","accessed":"2026-11-01","note":"Led expeditions 1808-1812 to found an agricultural settlement supplying Russian America."},{"id":"wp-arguello","title":"Luis Antonio Argüello","url":"https://en.wikipedia.org/wiki/Luis_Antonio_Arg%C3%BCello","publisher":"Wikipedia","accessed":"2026-11-01","note":"First governor to take office under Mexican rule, 1822."},{"id":"wp-las-californias","title":"Las Californias","url":"https://en.wikipedia.org/wiki/Las_Californias","publisher":"Wikipedia","accessed":"2026-11-01","note":"Province divided in 1804 into Alta and Baja California."},{"id":"wp-history-ca-pre-1900","title":"History of California before 1900","url":"https://en.wikipedia.org/wiki/History_of_California_before_1900","publisher":"Wikipedia","accessed":"2026-11-01","note":"Secularization Act of 1833; hides and tallow the primary exports until the mid-19th century."},{"id":"wp-two-years","title":"Two Years Before the Mast","url":"https://en.wikipedia.org/wiki/Two_Years_Before_the_Mast","publisher":"Wikipedia","accessed":"2026-11-01","note":"Dana's brig traded for California cow hides."},{"id":"ohp-chl-7","title":"Bear Flag Monument (CHL 7)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/7","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Bear Flag raised June 14, 1846; hauled down July 9, 1846."},{"id":"wp-donner-pass","title":"Donner Pass","url":"https://en.wikipedia.org/wiki/Donner_Pass","publisher":"Wikipedia","accessed":"2026-11-01","note":"Party blocked by snow in early November 1846; gives 81 settlers, 45 survivors."},{"id":"parks-marshall","title":"Marshall Gold Discovery State Historic Park","url":"https://www.parks.ca.gov/?page_id=484","publisher":"California State Parks","accessed":"2026-11-01","note":"Marshall found gold in 1848 at Coloma on the South Fork American River."},{"id":"wp-mexican-cession","title":"Mexican Cession","url":"https://en.wikipedia.org/wiki/Mexican_Cession","publisher":"Wikipedia","accessed":"2026-11-01","note":"~529,000 sq mi excluding Texas; $15 million paid."},{"id":"avalon-treaty","title":"Treaty of Guadalupe Hidalgo (text)","url":"https://avalon.law.yale.edu/19th_century/guadhida.asp","publisher":"Yale Avalon Project","accessed":"2026-11-01","note":"Article V: line from the Gila-Colorado junction to a point one marine league south of the southernmost point of the port of San Diego."},{"id":"wp-mexico-us-border","title":"Mexico-United States border","url":"https://en.wikipedia.org/wiki/Mexico%E2%80%93United_States_border","publisher":"Wikipedia","accessed":"2026-11-01","note":"Initial point one marine league south of San Diego Bay; straight line to the Colorado-Gila confluence."},{"id":"wp-42nd-parallel","title":"42nd parallel north","url":"https://en.wikipedia.org/wiki/42nd_parallel_north","publisher":"Wikipedia","accessed":"2026-11-01","note":"Oregon/California border; set by the Adams-Onís Treaty of 1819."},{"id":"wp-1849-convention","title":"1849 California Constitutional Convention","url":"https://en.wikipedia.org/wiki/1849_California_Constitutional_Convention","publisher":"Wikipedia","accessed":"2026-11-01","note":"Monterey convention banned slavery; eastern boundary a compromise."},{"id":"wp-admission-day","title":"California Admission Day","url":"https://en.wikipedia.org/wiki/California_Admission_Day","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed Sept 9, 1850; free state; never an organized territory."},{"id":"wp-fugitive-slave-act","title":"Fugitive Slave Act of 1850","url":"https://en.wikipedia.org/wiki/Fugitive_Slave_Act_of_1850","publisher":"Wikipedia","accessed":"2026-11-01","note":"Passed Sept 18, 1850 as part of the Compromise of 1850."},{"id":"wp-san-jose","title":"San Jose, California","url":"https://en.wikipedia.org/wiki/San_Jose,_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Served as the state's first capital."},{"id":"wp-state-capitol","title":"California State Capitol","url":"https://en.wikipedia.org/wiki/California_State_Capitol","publisher":"Wikipedia","accessed":"2026-11-01","note":"Construction 1860-1874."},{"id":"wp-pony-express-trail","title":"Pony Express National Historic Trail","url":"https://en.wikipedia.org/wiki/Pony_Express_National_Historic_Trail","publisher":"Wikipedia","accessed":"2026-11-01","note":"Founded April 3, 1860; defunct Oct 26, 1861; 18 months; ~10 days."},{"id":"wp-creighton","title":"Edward Creighton","url":"https://en.wikipedia.org/wiki/Edward_Creighton","publisher":"Wikipedia","accessed":"2026-11-01","note":"Transcontinental telegraph line completed October 24, 1861."},{"id":"wp-western-union","title":"Western Union","url":"https://en.wikipedia.org/wiki/Western_Union","publisher":"Wikipedia","accessed":"2026-11-01","note":"Completed the first transcontinental telegraph in 1861; first messages to Lincoln."},{"id":"wp-mariposa-grove","title":"Mariposa Grove","url":"https://en.wikipedia.org/wiki/Mariposa_Grove","publisher":"Wikipedia","accessed":"2026-11-01","note":"Lincoln signed the Act on June 30, 1864 ceding the grove and Yosemite Valley to California."},{"id":"wp-golden-spike","title":"Golden spike","url":"https://en.wikipedia.org/wiki/Golden_spike","publisher":"Wikipedia","accessed":"2026-11-01","note":"Driven by Stanford May 10, 1869 at Promontory Summit."},{"id":"wp-central-pacific","title":"Central Pacific Railroad","url":"https://en.wikipedia.org/wiki/Central_Pacific_Railroad","publisher":"Wikipedia","accessed":"2026-11-01","note":"Chinese laborers were the main workforce (12,000 by 1868, ~80%)."},{"id":"wp-nob-hill","title":"Nob Hill, San Francisco","url":"https://en.wikipedia.org/wiki/Nob_Hill,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Renamed for the Central Pacific \"nabobs\" who built mansions there."},{"id":"ballotpedia-ca-constitution","title":"California Constitution","url":"https://ballotpedia.org/California_Constitution","publisher":"Ballotpedia","accessed":"2026-11-01","note":"Current constitution adopted 1879; second of two."},{"id":"wp-workingmens","title":"Workingmen's Party of California","url":"https://en.wikipedia.org/wiki/Workingmen%27s_Party_of_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Won 51 of 152 delegates to the 1878-79 convention; anti-Chinese, anti-railroad."},{"id":"wp-john-muir","title":"John Muir","url":"https://en.wikipedia.org/wiki/John_Muir","publisher":"Wikipedia","accessed":"2026-11-01","note":"1890 park bill with R. U. Johnson; Sierra Club first meeting May 28, 1892; Muir president until death."},{"id":"sierraclub-about","title":"About the Sierra Club","url":"https://www.sierraclub.org/about-sierra-club","publisher":"Sierra Club","accessed":"2026-11-01","note":"Founded 1892; Muir among first members."},{"id":"wp-prop-4-1911","title":"1911 California Proposition 4","url":"https://en.wikipedia.org/wiki/1911_California_Proposition_4","publisher":"Wikipedia","accessed":"2026-11-01","note":"Oct 10, 1911: 125,037 yes to 121,450 no; sixth state."},{"id":"calib-state-symbols","title":"California State Symbols","url":"https://www.library.ca.gov/california-history/state-symbols/","publisher":"California State Library","accessed":"2026-11-01","note":"Flag adopted 1911; Minerva on the seal; Eureka official motto 1963; last grizzly killed Tulare County Aug 1922; state animal 1953."},{"id":"wp-nestor","title":"Nestor Film Company","url":"https://en.wikipedia.org/wiki/Nestor_Film_Company","publisher":"Wikipedia","accessed":"2026-11-01","note":"Established the first permanent Hollywood studio on Oct 27, 1911."},{"id":"wp-mulholland","title":"William Mulholland","url":"https://en.wikipedia.org/wiki/William_Mulholland","publisher":"Wikipedia","accessed":"2026-11-01","note":"233-mile aqueduct inaugurated November 1913."},{"id":"wp-water-wars","title":"California water wars","url":"https://en.wikipedia.org/wiki/California_water_wars","publisher":"Wikipedia","accessed":"2026-11-01","note":"Ranchers dynamited the aqueduct in the 1920s."},{"id":"wp-oshaughnessy-dam","title":"O'Shaughnessy Dam (California)","url":"https://en.wikipedia.org/wiki/O%27Shaughnessy_Dam_(California)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Wilson signed the Raker Act Dec 19, 1913."},{"id":"wp-sergas","title":"Las sergas de Esplandián","url":"https://en.wikipedia.org/wiki/Las_sergas_de_Esplandi%C3%A1n","publisher":"Wikipedia","accessed":"2026-11-01","note":"1510 novel; island of California inhabited by Black women ruled by Queen Calafia."},{"id":"wp-japanese-internment","title":"Internment of Japanese Americans","url":"https://en.wikipedia.org/wiki/Internment_of_Japanese_Americans","publisher":"Wikipedia","accessed":"2026-11-01","note":"About 120,000 incarcerated, two-thirds US citizens; EO 9066 Feb 19, 1942; Civil Liberties Act 1988."},{"id":"wp-reitman","title":"Reitman v. Mulkey","url":"https://en.wikipedia.org/wiki/Reitman_v._Mulkey","publisher":"Wikipedia","accessed":"2026-11-01","note":"Prop 14 passed Nov 3, 1964 with two-thirds; struck down 1967."},{"id":"wp-don-hoefler","title":"Don Hoefler","url":"https://en.wikipedia.org/wiki/Don_Hoefler","publisher":"Wikipedia","accessed":"2026-11-01","note":"\"Silicon Valley, USA\" series in Electronic News starting Jan 11, 1971."},{"id":"ballotpedia-prop-13","title":"California Proposition 13 (June 1978)","url":"https://ballotpedia.org/California_Proposition_13,_Tax_Limitations_Initiative_(June_1978)","publisher":"Ballotpedia","accessed":"2026-11-01","note":"June 6, 1978; 1 percent cap; 2 percent annual limit."},{"id":"lao-prop-13","title":"Common Claims About Proposition 13","url":"https://lao.ca.gov/Publications/Report/3497","publisher":"California Legislative Analyst's Office","accessed":"2026-11-01","note":"Property taxes capped at 1 percent."}],"items":[{"id":"caf-precontact-population","name":"About 300,000","tier":2,"explanation":"Estimates cluster around 300,000 to 340,000 people speaking some 80 to 100 languages from about ten language families, the densest and most diverse Native population north of Mexico. Disease, dispossession and violence cut that to roughly 16,000 by 1900.","sources":["wp-indigenous-ca","pbs-socal-ca-indians","wp-pop-history-americas"],"tags":["indigenous"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Indigenous peoples of California: ~340,000 in 1769, ten linguistic families, 78+ languages, highest density north of Mexico, 16,000 by 1900; population-history table gives 340,000 (Cook). Distractors are off by an order of magnitude."}],"kind":"fact","question":"Roughly how many Indigenous people lived in the region that became California when Spanish colonization began in 1769?","distractors":["About 30,000","About 1 million","About 3 million"]},{"id":"caf-cabrillo-san-diego","name":"Cabrillo sails into San Diego Bay","tier":2,"explanation":"Juan Rodríguez Cabrillo, sailing for Spain, became the first European to reach the California coast when his flagship San Salvador entered the bay he named San Miguel. He died in the Channel Islands that winter, and Spain largely ignored the coast for 60 years.","sources":["wp-cabrillo","nps-cabrillo","sdmaritime-san-salvador"],"tags":["exploration"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Maritime Museum of San Diego: San Salvador arrived at San Diego Sept 28, 1542. Wikipedia and NPS: named San Miguel; died Jan 3, 1543."}],"kind":"event","year":1542,"month":9,"day":28},{"id":"caf-drake-nova-albion","name":"Drake lands and claims Nova Albion","tier":2,"explanation":"Francis Drake beached the Golden Hind for five weeks of repairs, most likely at Drakes Bay on Point Reyes, and claimed the land for Elizabeth I as Nova Albion. The English claim went nowhere, but the name stuck to the bay.","sources":["wp-new-albion","wp-drakes-bay","wp-drake-in-california"],"tags":["exploration"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia New Albion: landed 17 June 1579, left 23 July; Wikipedia Drake in California: five weeks of repairs after careening the ship; Drakes Bay article: believed site."}],"kind":"event","year":1579,"month":6,"day":17},{"id":"caf-vizcaino-monterey","name":"Vizcaíno names Monterey","tier":3,"explanation":"Sebastián Vizcaíno anchored in the bay on December 16, 1602 and named it for the viceroy who sent him, the Conde de Monterrey. His glowing description of the harbor is why Portolá was sent to find it in 1769, and why Monterey became Spanish California's capital.","sources":["wp-monterey-ca","mchs-vizcaino","wp-monterey-bay"],"tags":["exploration"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Monterey Bay: Vizcaíno entered and named the bay Dec 16, 1602; Wikipedia Vizcaíno: named for the Conde de Monterrey, settlement deferred 167 years."}],"kind":"event","year":1602,"month":12,"day":16},{"id":"caf-first-mission-san-diego","name":"Serra founds Mission San Diego, the first California mission","tier":1,"explanation":"Junípero Serra raised a cross above San Diego Bay on July 16, 1769, planting the first of 21 Franciscan missions as Spain finally moved to occupy Alta California. The mission chain would remake and devastate Native life along the coast.","sources":["wp-mission-san-diego","cmf-mission-san-diego","ohp-chl-242"],"tags":["mission","spanish"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CHL 242: Serra raised a cross on Sunday July 16, 1769 to establish Alta California's first mission."}],"kind":"event","year":1769,"month":7,"day":16},{"id":"caf-number-of-missions","name":"21","tier":1,"explanation":"The chain ran from San Diego (1769) to San Francisco Solano in Sonoma (1823), each a farm, church and labor camp for the Native people baptized into it. Mission records list at least 87,787 baptisms and 63,789 deaths.","sources":["wp-spanish-missions-ca","cmf-mission-solano","wp-el-camino-real"],"tags":["mission","spanish"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia El Camino Real and Spanish missions: 21 missions, 1769-1823; \"at least 87,787 baptisms and 63,789 deaths\". Removed the unsupported \"by 1832\" qualifier."}],"kind":"fact","question":"How many Franciscan missions were founded in Alta California?","distractors":["12","18","27"]},{"id":"caf-last-mission-sonoma","name":"Last mission founded at Sonoma","tier":3,"explanation":"Father José Altimira founded San Francisco Solano on July 4, 1823, the 21st, northernmost and last mission, and the only one established after Mexico won independence. Its plaza later hosted the Bear Flag Revolt.","sources":["wp-mission-solano","cmf-mission-solano","ohp-chl-3"],"tags":["mission"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CHL 3: founded July 4, 1823 by Altimira; northernmost; only mission under independent Mexico. Sonoma SHP: birthplace of the Bear Flag."}],"kind":"event","year":1823,"month":7,"day":4},{"id":"caf-el-camino-real","name":"El Camino Real","tier":2,"explanation":"The Royal Road is a roughly 600-mile commemorative route from San Diego to Sonoma, marked since 1906 by cast-iron mission bells. The idea that missions were deliberately spaced a day's ride (about 30 miles) apart appears in no historical source and first surfaced in the 20th century.","sources":["wp-el-camino-real","wp-spanish-missions-ca"],"tags":["mission"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia El Camino Real: 600-mile commemorative route, 21 missions, four presidios, three pueblos; first bell unveiled Aug 15, 1906; the 30-mile-spacing claim first appeared in 20th-century writing. Reworded to match."}],"kind":"fact","question":"What is the name of the historic route linking California's 21 missions, four presidios and three pueblos?","distractors":["The Old Spanish Trail","The Anza Trail","The Siskiyou Trail"]},{"id":"caf-fort-ross","name":"Russians establish Fort Ross","tier":2,"explanation":"The Russian-American Company under Ivan Kuskov built a stockaded colony on the Sonoma coast in 1812 to hunt sea otters and grow food for Alaska. It was Russia's southernmost colony in North America until the company sold out to John Sutter in 1841.","sources":["wp-fort-ross","parks-fort-ross","wp-kuskov"],"tags":["russian"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Fort Ross SHP: North America's southernmost Russian colony, founded 1812. Wikipedia Kuskov: expeditions to found a settlement supplying Alaska. Wikipedia Fort Ross: sold to Sutter Dec 1841."}],"kind":"event","year":1812},{"id":"caf-mexican-independence","name":"Mexico wins independence; California becomes Mexican","tier":2,"explanation":"Spain's rule ended in 1821, and the Californios in Monterey swore allegiance to the new Mexican government in 1822. Mexico's 25 years brought secularized missions, vast ranchos and a wave of American newcomers.","sources":["wp-alta-california","wp-mexican-independence","wp-arguello"],"tags":["mexican"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Mexican War of Independence: ended Sept 1821. Wikipedia Argüello: first governor under Mexican rule, 1822. Could not independently confirm \"April\", so softened to 1822."}],"kind":"event","year":1821},{"id":"caf-alta-california","name":"Alta California","tier":3,"explanation":"Upper California was split from Baja California as its own province in 1804. The name survives in the 'Alta' of place names and in the state's claim to the old Spanish and Mexican heritage of the missions and ranchos.","sources":["wp-alta-california","wp-spanish-missions-ca","wp-las-californias"],"tags":["spanish","mexican"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Las Californias: single province divided in 1804 into Alta and Baja California."}],"kind":"fact","question":"Under Spain and Mexico, the province covering the future state was called what?","distractors":["Baja California","Nueva Galicia","Nuevo México"]},{"id":"caf-secularization","name":"Mexico secularizes the missions","tier":2,"explanation":"The Mexican Congress decreed on August 17, 1833 that mission lands pass out of Franciscan control. The law promised plots to Native converts, but most land went to well-connected Californio families as ranchos.","sources":["wp-secularization","wp-spanish-missions-ca","wp-alta-california","wp-history-ca-pre-1900"],"tags":["mexican","mission"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia History of California before 1900: Mexican Secularization Act of 1833; cited article gives Aug 17, 1833 and the diversion of land to Californios."}],"kind":"event","year":1833,"month":8,"day":17},{"id":"caf-rancho-economy","name":"Cattle hides and tallow","tier":3,"explanation":"Rancheros raised cattle not for beef but for hides, sold to New England ships for shoe leather, and for tallow rendered into candles and soap. The hide-and-tallow trade is the world Richard Henry Dana described in Two Years Before the Mast.","sources":["wp-ranchos","wp-alta-california","wp-history-ca-pre-1900","wp-two-years"],"tags":["mexican"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia History of California before 1900: cow hides and tallow were the primary exports until the mid-19th century. Wikipedia Two Years Before the Mast: Dana's brig traded for California hides."}],"kind":"fact","question":"What were the main exports of Mexican-era California ranchos?","distractors":["Gold dust and silver","Wheat and barley","Sea otter pelts"]},{"id":"caf-bear-flag-revolt","name":"Bear Flag Revolt","tier":1,"explanation":"On June 14, 1846 about 30 American settlers seized the Sonoma barracks, captured General Vallejo and raised a homemade flag with a grizzly and a star, declaring a California Republic. It lasted 25 days before the US Navy's flag replaced it.","sources":["wp-california-republic","wp-conquest-california","parks-sonoma-shp","ohp-chl-7"],"tags":["mexican-american-war"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CHL 7: Bear Flag raised June 14, 1846, hauled down July 9, 1846 (25 days). Vallejo's capture and ~30 men per Wikipedia California Republic."}],"kind":"event","year":1846,"month":6,"day":14},{"id":"caf-donner-party","name":"Donner Party trapped in the Sierra Nevada","tier":2,"explanation":"Delayed by an untested shortcut, the emigrant party was snowbound at Truckee Lake in late October and early November 1846. Relief parties reached them from February 1847; of the roughly 80 to 90 people who entered the mountains, only about half survived, some by cannibalism.","sources":["wp-donner-party","history-donner","wp-donner-pass"],"tags":["overland-migration"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Donner Pass: blocked by snow early November 1846. Survivor counts differ (Wikipedia 48 of 87; History.com 45 of 89; Donner Pass 45 of 81), so the explanation now gives a range."}],"kind":"event","year":1846},{"id":"caf-gold-discovered","name":"Gold discovered at Sutter's Mill","tier":1,"explanation":"James Marshall saw gold in the tailrace of John Sutter's sawmill on the American River at Coloma on January 24, 1848, nine days before Mexico signed California away. Some 300,000 people poured in over the next seven years.","sources":["wp-gold-rush","ohp-chl-530","parks-marshall"],"tags":["gold-rush"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Marshall Gold Discovery SHP: Marshall found gold in 1848 at Coloma; CHL 530 and Wikipedia give Jan 24, 1848 and ~300,000 arrivals by 1855."}],"kind":"event","year":1848,"month":1,"day":24},{"id":"caf-treaty-guadalupe-hidalgo","name":"Treaty of Guadalupe Hidalgo cedes California to the US","tier":1,"explanation":"Signed February 2, 1848, the treaty ended the Mexican-American War and transferred some 525,000 square miles, including California, for $15 million. Neither government yet knew gold had been found nine days earlier.","sources":["wp-treaty-gh","archives-treaty-gh","wp-mexican-cession"],"tags":["mexican-american-war"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"National Archives: signed Feb 2, 1848, ~525,000 sq mi, $15 million; Wikipedia Mexican Cession confirms $15 million. Gold was found Jan 24, nine days earlier (corrected from \"the week before\")."}],"kind":"event","year":1848,"month":2,"day":2},{"id":"caf-southern-border","name":"San Diego Bay","tier":4,"explanation":"American negotiators insisted on a line that kept the whole harbor of San Diego on the US side. The border then runs straight to the Colorado River junction with the Gila.","sources":["wp-treaty-gh","avalon-treaty","wp-mexico-us-border"],"tags":["borders"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Treaty text (Avalon Project) Article V: line from the Gila-Colorado junction to a point one marine league south of the southernmost point of the port of San Diego; Wikipedia border article agrees."}],"kind":"fact","question":"The 1848 treaty fixed California's southern border one league south of the southernmost point of which bay?","distractors":["Monterey Bay","Mission Bay","Todos Santos Bay"]},{"id":"caf-northern-border","name":"The 42nd parallel","tier":3,"explanation":"The Adams-Onís Treaty of 1819 between the US and Spain drew the 42nd parallel as the line between Spanish territory and the Oregon Country. California simply inherited it in 1850.","sources":["wp-adams-onis","state-dept-adams-onis","wp-42nd-parallel"],"tags":["borders"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia 42nd parallel north: Oregon/California border; set as the Spanish limit by the Adams-Onís Treaty of 1819. State Dept history confirms."}],"kind":"fact","question":"California's straight northern border with Oregon follows which line of latitude?","distractors":["The 40th parallel","The 45th parallel","The 49th parallel"]},{"id":"caf-monterey-convention","name":"Constitutional Convention opens at Colton Hall, Monterey","tier":2,"explanation":"Delegates met in Monterey's two-story town hall and schoolhouse from September 1, 1849 to write a constitution without waiting for Congress to make California a territory. They banned slavery, drew the eastern border at the Sierra crest and chose San Jose as the capital.","sources":["wp-colton-hall","ebsco-ca-admitted","wp-ca-constitution","wp-1849-convention"],"tags":["statehood"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia 1849 convention: banned slavery; eastern boundary a compromise. Wikipedia Colton Hall: Sept 1 to Oct 1849, school downstairs and assembly hall upstairs, San Jose chosen as capital. Delegate count dropped (Wikipedia says 48, Ballotpedia 49)."}],"kind":"event","year":1849,"month":9,"day":1},{"id":"caf-statehood","name":"California admitted as the 31st state","tier":1,"explanation":"President Fillmore signed the admission act on September 9, 1850, still celebrated as Admission Day. California skipped territorial status entirely, going straight from military occupation to statehood.","sources":["ca-gov-admission-day","ebsco-ca-admitted","wp-compromise-1850","wp-admission-day"],"tags":["statehood"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia California Admission Day: signed by Fillmore Sept 9, 1850; one of few states admitted without first being an organized territory."}],"kind":"event","year":1850,"month":9,"day":9},{"id":"caf-free-state","name":"A free state","tier":2,"explanation":"Admitting California free upset the Senate's balance, so the South was paid back with a harsher Fugitive Slave Act and popular sovereignty in New Mexico and Utah. The deal is often credited with postponing the Civil War by a decade.","sources":["wp-compromise-1850","ebsco-ca-admitted","ca-gov-admission-day","wp-fugitive-slave-act"],"tags":["statehood"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Admission Day and Compromise of 1850: free state; Wikipedia Fugitive Slave Act: passed Sept 18, 1850 as part of the Compromise. Causal \"postponed the Civil War\" softened."}],"kind":"fact","question":"Under the Compromise of 1850, California entered the Union as what?","distractors":["A slave state","A popular-sovereignty state","A pair of states, one free and one slave"]},{"id":"caf-first-capital","name":"San Jose","tier":3,"explanation":"The Legislature met in a cramped adobe in San Jose from December 1849 before bouncing to Vallejo and Benicia. Monterey had been the capital under Spain and Mexico, but never of the state.","sources":["capitolmuseum-capitals","wp-sacramento","wp-colton-hall","wp-san-jose"],"tags":["capital"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Capitol Museum: Legislature in Pueblo de San Jose Dec 15, 1849 to May 1, 1851 in an adobe building; Wikipedia San Jose: first state capital; Monterey was the Spanish/Mexican capital."}],"kind":"fact","question":"Which city was California's first state capital?","distractors":["Monterey","Vallejo","Benicia"]},{"id":"caf-sacramento-capital","name":"Sacramento becomes the state capital","tier":3,"explanation":"After stops in San Jose, Vallejo and Benicia, the Legislature settled in flood-prone Sacramento in February 1854 and never left. The Capitol building there took from 1860 to 1874 to finish.","sources":["capitolmuseum-capitals","wp-sacramento","wp-state-capitol"],"tags":["capital"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Capitol Museum: Sacramento made permanent capital in 1854 (Benicia until Feb 25, 1854). Wikipedia State Capitol: built 1860-1874."}],"kind":"event","year":1854,"month":2},{"id":"caf-pony-express","name":"Pony Express begins","tier":2,"explanation":"Riders left St. Joseph, Missouri and Sacramento simultaneously on April 3, 1860, relaying mail nearly 1,900 miles in about ten days. The service lasted only 18 months before the telegraph made it obsolete.","sources":["wp-pony-express","nps-pony-express","wp-pony-express-trail"],"tags":["communication"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Pony Express trail: founded April 3, 1860 in St. Joseph, defunct Oct 26, 1861, 18 months, ~10 days; NPS: 1,800+ miles."}],"kind":"event","year":1860,"month":4,"day":3},{"id":"caf-transcontinental-telegraph","name":"Transcontinental telegraph completed","tier":3,"explanation":"Crews joined the eastern and western lines at Salt Lake City on October 24, 1861, and California's chief justice Stephen Field wired Lincoln pledging the state's loyalty to the Union. The Pony Express shut down two days later.","sources":["wp-telegraph","history-telegraph","wp-creighton","wp-western-union"],"tags":["communication"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Edward Creighton: line completed Oct 24, 1861; Wikipedia Western Union: first messages to Lincoln. Field's message and Salt Lake City per cited Wikipedia/History.com."}],"kind":"event","year":1861,"month":10,"day":24},{"id":"caf-yosemite-grant","name":"Lincoln signs the Yosemite Grant","tier":2,"explanation":"In the middle of the Civil War, Lincoln signed an act on June 30, 1864 giving Yosemite Valley and the Mariposa Grove to California to hold for public use forever. It was the first time the federal government set land aside for preservation, the seed of the national park idea.","sources":["wp-yosemite-grant","nps-yosemite-history","wp-mariposa-grove"],"tags":["parks"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Mariposa Grove: Lincoln signed the Act June 30, 1864 ceding the grove and Yosemite Valley to California."}],"kind":"event","year":1864,"month":6,"day":30},{"id":"caf-golden-spike","name":"Transcontinental railroad completed at Promontory","tier":1,"explanation":"Leland Stanford tapped in the golden spike on May 10, 1869 where the Central Pacific, built east from Sacramento, met the Union Pacific in Utah. A cross-country trip fell from months to about a week.","sources":["wp-railroad","nps-golden-spike","wp-golden-spike"],"tags":["railroad"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Golden spike: driven by Stanford May 10, 1869 at Promontory Summit, joining the Central Pacific from Sacramento and Union Pacific."}],"kind":"event","year":1869,"month":5,"day":10},{"id":"caf-chinese-railroad-workers","name":"Chinese immigrants","tier":2,"explanation":"Some 10,000 to 15,000 Chinese workers at a time blasted the Sierra tunnels and laid track for less pay than white workers, striking in 1867 for better terms. Their contribution went largely unrecognized for a century.","sources":["stanford-crw-faq","wp-railroad","wp-central-pacific"],"tags":["railroad","chinese-american"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Stanford Chinese Railroad Workers Project: 10,000-15,000 at a time, ~90% of the workforce by 1867, 1867 strike. Wikipedia Central Pacific gives 12,000 and ~80% by 1868, consistent in order of magnitude."}],"kind":"fact","question":"Who made up roughly 90 percent of the Central Pacific Railroad's construction workforce by 1867?","distractors":["Irish immigrants","Mexican laborers","Civil War veterans"]},{"id":"caf-big-four","name":"Stanford, Huntington, Hopkins and Crocker","tier":3,"explanation":"Four Sacramento merchants, Leland Stanford, Collis Huntington, Mark Hopkins and Charles Crocker, bankrolled the railroad and became California's most powerful men. Their San Francisco mansions gave Nob Hill its name.","sources":["wp-big-four","wp-railroad","wp-nob-hill"],"tags":["railroad"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Big Four and Nob Hill: Stanford, Huntington, Hopkins, Crocker; Nob Hill renamed after the Central Pacific magnates built mansions there. Distractor sets are Comstock/other SF magnates."}],"kind":"fact","question":"Who were the 'Big Four' who financed and ran the Central Pacific Railroad?","distractors":["Hearst, Flood, Fair and Mackay","Sutro, Ralston, Sharon and Mills","Lick, Spreckels, Hearst and Fair"]},{"id":"caf-1879-constitution","name":"Voters ratify the second state constitution","tier":4,"explanation":"Amid depression and anti-railroad, anti-Chinese agitation led by the Workingmen's Party, a convention rewrote the 1849 constitution and voters ratified it on May 7, 1879. Heavily amended, it is still the constitution California uses.","sources":["wp-ca-constitution","joincalifornia-1879","ballotpedia-ca-constitution","wp-workingmens"],"tags":["government"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"JoinCalifornia election page: ratified May 7, 1879 (77,959-67,134); Ballotpedia: current constitution adopted 1879; Wikipedia Workingmen's Party: 51 of 152 convention delegates."}],"kind":"event","year":1879,"month":5,"day":7},{"id":"caf-yosemite-national-park","name":"Yosemite National Park established","tier":2,"explanation":"Congress created the park on October 1, 1890 after a campaign by John Muir and editor Robert Underwood Johnson to protect the high country around the state-run valley. California handed the valley itself back to federal control in 1906.","sources":["wp-yosemite-np","nps-yosemite-history","wp-john-muir"],"tags":["parks"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia John Muir: Century articles with Robert Underwood Johnson led to the 1890 park bill. NPS and Wikipedia: established Oct 1, 1890; valley returned 1906."}],"kind":"event","year":1890,"month":10,"day":1},{"id":"caf-sierra-club-founded","name":"John Muir founds the Sierra Club","tier":3,"explanation":"Muir and a group of Bay Area academics organized the club in San Francisco on May 28, 1892 to defend the Sierra Nevada, with Muir as president until his death. Its first great loss, Hetch Hetchy in 1913, turned it into a national political force.","sources":["wp-sierra-club","wp-john-muir","sierraclub-about"],"tags":["environment"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia John Muir: first meeting May 28, 1892 in San Francisco, Muir president until his death 22 years later, board included Stanford's David Starr Jordan. sierraclub.org: since 1892."}],"kind":"event","year":1892,"month":5,"day":28},{"id":"caf-women-suffrage","name":"California women win the vote","tier":2,"explanation":"Proposition 4 squeaked through on October 10, 1911 by 3,587 votes out of nearly 250,000, with San Francisco voting no, making California the sixth state with women's suffrage, nine years before the 19th Amendment.","sources":["wp-suffrage-ca","sos-suffrage-1911","wp-prop-4-1911"],"tags":["government"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Prop 4: Oct 10, 1911, 125,037 to 121,450 (3,587 margin), sixth state. SOS: San Francisco among eight counties voting no."}],"kind":"event","year":1911,"month":10,"day":10},{"id":"caf-state-flag-adopted","name":"Bear Flag adopted as the state flag","tier":3,"explanation":"The Legislature made a version of the 1846 revolt banner the official state flag on February 3, 1911. The original Sonoma flag had burned in the 1906 San Francisco fire; the bear's current look dates from 1953.","sources":["wp-flag-ca","capitolmuseum-flag","calib-state-symbols"],"tags":["symbols"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"California State Library: adopted as state flag by the Legislature in 1911. Feb 3, 1911, the 1906 loss of the original and the 1953 standardization per cited Wikipedia and Capitol Museum."}],"kind":"event","year":1911,"month":2,"day":3},{"id":"caf-hollywood-first-studio","name":"Hollywood's first movie studio opens","tier":3,"explanation":"David Horsley's Nestor Company set up in a former tavern at Sunset and Gower in October 1911, chasing sunshine and distance from Edison's patent lawyers. Within a decade the farm town annexed by Los Angeles in 1910 was the capital of the movie business.","sources":["wp-hollywood","moviestudios-nestor","wp-nestor"],"tags":["industry"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Nestor Film Company: first permanent studio in Hollywood established Oct 27, 1911 (not first in Los Angeles). Hollywood annexed 1910 per cited Wikipedia. Month-level date retained."}],"kind":"event","year":1911,"month":10},{"id":"caf-la-aqueduct","name":"Los Angeles Aqueduct opens","tier":2,"explanation":"William Mulholland's 233-mile aqueduct delivered Owens River water to the San Fernando Valley on November 5, 1913, enabling Los Angeles to grow into the state's largest city. The drained Owens Valley fought back with dynamite in the 1920s.","sources":["wp-la-aqueduct","ladwp-aqueduct","wp-mulholland","wp-water-wars"],"tags":["water"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Mulholland: 233-mile aqueduct inaugurated November 1913; Wikipedia LA Aqueduct: Cascades completed Nov 5, 1913; Wikipedia water wars: ranchers dynamited the aqueduct in 1924-27."}],"kind":"event","year":1913,"month":11,"day":5},{"id":"caf-raker-act","name":"Raker Act allows San Francisco to dam Hetch Hetchy","tier":3,"explanation":"President Wilson signed the act on December 19, 1913 letting San Francisco flood Hetch Hetchy Valley inside Yosemite National Park over John Muir's bitter opposition. The fight helped create the National Park Service three years later.","sources":["wp-raker-act","archives-raker-act","nps-yosemite-history","wp-oshaughnessy-dam"],"tags":["water","parks"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia O'Shaughnessy Dam and National Archives: Wilson signed Dec 19, 1913. Wikipedia Raker Act: the fight was a proponent for creating the National Park Service."}],"kind":"event","year":1913,"month":12,"day":19},{"id":"caf-state-name-origin","name":"A fictional island in a 1510 Spanish romance novel","tier":2,"explanation":"Garci Rodríguez de Montalvo's Las sergas de Esplandián described an island of Black warrior women ruled by Queen Calafia. Spanish explorers in the 1530s, believing Baja California an island, borrowed the name.","sources":["wp-etymology-ca","usc-ca-name","wp-sergas"],"tags":["symbols"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Las sergas de Esplandián: 1510 Montalvo novel; island of California inhabited by Black women ruled by Queen Calafia. USC: leading theory; alternatives listed as distractors."}],"kind":"fact","question":"Where does the name 'California' most likely come from?","distractors":["A Latin phrase meaning 'hot furnace'","An Indigenous word for 'high mountains'","A province in northern Spain"]},{"id":"caf-great-seal-goddess","name":"Minerva","tier":4,"explanation":"Minerva, who sprang fully grown from Jupiter's head, symbolized a state born without a territorial childhood. The 1849 seal also shows a grizzly, a miner, ships on the bay, the Sierra and 31 stars.","sources":["wp-great-seal","capitolmuseum-seal","calib-state-symbols"],"tags":["symbols"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"California State Library: Minerva, grizzly, miner, ships, Sierra, 31 stars; \"sprung full-grown from the head of Jupiter\" symbolism. Distractors are other Roman goddesses."}],"kind":"fact","question":"Which Roman goddess is the central figure on the Great Seal of California?","distractors":["Diana","Juno","Ceres"]},{"id":"caf-state-motto","name":"Eureka","tier":2,"explanation":"The Greek for 'I have found it' was put on the Great Seal in 1849 as a nod to the gold discovery, but only became the official motto by statute in 1963.","sources":["capitolmuseum-motto","wp-great-seal","calib-state-symbols"],"tags":["symbols"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"California State Library: Eureka on the seal since 1849, made official state motto in 1963."}],"kind":"fact","question":"What is California's state motto?","distractors":["Excelsior","Esto Perpetua","Ad Astra per Aspera"]},{"id":"caf-grizzly-extinct","name":"1922","tier":3,"explanation":"The last hunted grizzly was killed in Tulare County in August 1922 and the last sighting came in 1924 in Sequoia National Park. The state named the extinct bear its official animal in 1953.","sources":["wp-ca-grizzly","capitolmuseum-grizzly","calib-state-symbols"],"tags":["symbols","wildlife"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"California State Library and Wikipedia: last grizzly killed in Tulare County August 1922; last sighting 1924 in Sequoia NP; state animal 1953."}],"kind":"fact","question":"In what year was the last California grizzly bear reported shot?","distractors":["1890","1908","1948"]},{"id":"caf-eo-9066","name":"Executive Order 9066 signed","tier":2,"explanation":"Franklin Roosevelt's order of February 19, 1942 let the Army exclude anyone from the West Coast, leading to the incarceration of about 120,000 Japanese Americans, most of them US citizens, in camps such as Manzanar and Tule Lake. Congress apologized and paid redress in 1988.","sources":["wp-eo-9066","archives-eo-9066","wp-japanese-internment"],"tags":["wwii","civil-rights"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"National Archives and Wikipedia internment article: EO 9066 Feb 19, 1942; ~120,000 incarcerated, about two-thirds citizens; Civil Liberties Act of 1988."}],"kind":"event","year":1942,"month":2,"day":19},{"id":"caf-bracero-program","name":"Bracero Program begins","tier":3,"explanation":"A US-Mexico agreement signed August 4, 1942 brought Mexican contract workers to fill wartime farm labor shortages, starting with the sugar-beet harvest at Stockton. The program ran until 1964 and issued some 4.6 million contracts.","sources":["wp-bracero","bracero-archive"],"tags":["labor","agriculture"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Re-opened cited Wikipedia (agreement Aug 4, 1942; began at Stockton; first braceros for the sugar-beet harvest; 4.6 million contracts; ended 1964) and Bracero History Archive. No other reachable independent source."}],"kind":"event","year":1942,"month":8,"day":4},{"id":"caf-prop-14","name":"Proposition 14 repeals fair housing","tier":4,"explanation":"On November 3, 1964 about 65 percent of California voters passed Prop 14, writing a right to discriminate in housing sales into the state constitution and nullifying the 1963 Rumford Fair Housing Act. The US Supreme Court struck it down in Reitman v. Mulkey in 1967.","sources":["wp-prop-14","wp-reitman"],"tags":["civil-rights"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Reitman v. Mulkey: Prop 14 passed Nov 3, 1964 with two-thirds of voters; struck down 1967. 65.39% per cited Wikipedia."}],"kind":"event","year":1964,"month":11,"day":3},{"id":"caf-silicon-valley-named","name":"'Silicon Valley' enters print","tier":3,"explanation":"Journalist Don Hoefler's series 'Silicon Valley U.S.A.' in the trade paper Electronic News, beginning January 11, 1971, popularized the nickname for the Santa Clara Valley's chip industry. The term only became everyday language in the 1980s.","sources":["wp-silicon-valley","chm-silicon-valley-name","wp-don-hoefler"],"tags":["tech"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Don Hoefler: \"Silicon Valley, USA\" series in Electronic News starting Jan 11, 1971; CHM confirms."}],"kind":"event","year":1971,"month":1,"day":11},{"id":"caf-prop-13","name":"Proposition 13 passes","tier":2,"explanation":"Howard Jarvis's tax revolt won nearly two-thirds of the vote on June 6, 1978, capping property taxes at one percent of assessed value and limiting increases to two percent a year until a sale. It reshaped school and local-government finance for generations.","sources":["wp-prop-13","hjta-prop-13","ballotpedia-prop-13","lao-prop-13"],"tags":["government"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Ballotpedia: June 6, 1978, 1 percent cap and 2 percent annual limit; LAO confirms the 1 percent cap; Wikipedia: passed with roughly two-thirds."}],"kind":"event","year":1978,"month":6,"day":6}]},{"id":"ca-geography","title":"California","subtitle":"Cities, parks, peaks, rivers and landmarks across the Golden State","description":"Pin the places that define California: its big cities and small crossroads, national parks, highest peaks, mountain ranges, great rivers and lakes, farm valleys and deserts, and the heritage sites where its history happened.","map":"ca","order":50,"accent":"poppy","sources":[{"id":"ngs-dx5119","title":"NGS datasheet DX5119 (SAN JACINTO RESET)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=DX5119","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NGS datasheet (VERTCON3) gives 10,835 ft; Wikipedia infobox gives 10,834 ft."},{"id":"ngs-gs0799","title":"NGS datasheet GS0799 (TELESCOPE)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=GS0799","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height, VERTCON3."},{"id":"ngs-gt1811","title":"NGS datasheet GT1811 (WHITNEY)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=GT1811","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height, VERTCON3."},{"id":"ngs-hr2868","title":"NGS datasheet HR2868 (CLOUDS REST)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HR2868","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height, VERTCON3."},{"id":"ngs-hr2884","title":"NGS datasheet HR2884 (LYELL 2)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HR2884","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height, VERTCON3."},{"id":"ngs-hs4865","title":"NGS datasheet HS4865 (MT HAMILTON OBS SM DOME 1882)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HS4865","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"Station is the small dome of Lick Observatory: 4,265 ft NAVD 88 (VERTCON3), the figure Wikipedia uses. The eccentric ground mark HS4863 (GPS) is 4,216 ft, so the ground on the levelled summit is about 50 ft lower than the quoted elevation."},{"id":"ngs-hs5120","title":"NGS datasheet HS5120 (MOUNT DIABLO)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HS5120","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"Station mark on the summit pier: 3,864 ft NAVD 88 (VERTCON3 from a 1986 vertical-angle height). The accepted summit elevation used here is 3,849 ft (Wikipedia infobox, NAVD 88), which USGS 3DEP lidar (3,846 ft) supports."},{"id":"ngs-lt0688","title":"NGS datasheet LT0688 (LASSEN)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=LT0688","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height 3188.8 m = 10,462 ft (VERTCON3); station is on the highest point of Lassen Peak. Wikipedia and the NPS quote 10,457 ft (the pre-VERTCON3 value); USGS 3DEP lidar gives 10,450 ft."},{"id":"ngs-mx1016","title":"NGS datasheet MX1016 (MT SHASTA)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=MX1016","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height, VERTCON3."},{"id":"ngs-mx1043","title":"NGS datasheet MX1043 (EDDY)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=MX1043","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NGS datasheet (VERTCON3) gives 9,038 ft; Wikipedia infobox gives 9,037 ft."},{"id":"wp-alcatraz","title":"Alcatraz Island – Wikipedia","url":"https://en.wikipedia.org/wiki/Alcatraz_Island","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-american-river","title":"American River – Wikipedia","url":"https://en.wikipedia.org/wiki/American_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-anaheim","title":"Anaheim, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Anaheim%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-angel-island-immigration","title":"Angel Island Immigration Station – Wikipedia","url":"https://en.wikipedia.org/wiki/Angel_Island_Immigration_Station","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-bakersfield","title":"Bakersfield, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Bakersfield%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-barstow","title":"Barstow, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Barstow%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-big-sur","title":"Big Sur – Wikipedia","url":"https://en.wikipedia.org/wiki/Big_Sur","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-bishop","title":"Bishop, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Bishop%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-blythe","title":"Blythe, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Blythe%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-bodie","title":"Bodie, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Bodie%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-cabrillo-nm","title":"Cabrillo National Monument – Wikipedia","url":"https://en.wikipedia.org/wiki/Cabrillo_National_Monument","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-cascade-range","title":"Cascade Range – Wikipedia","url":"https://en.wikipedia.org/wiki/Cascade_Range","publisher":"Wikipedia","accessed":"2026-11-01","note":"Wikipedia's coordinate is Mount Rainier (WA); the item uses a point midway between Mount Shasta and Lassen Peak for the California portion."},{"id":"wp-central-valley","title":"Central Valley (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Central_Valley_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-channel-islands-np","title":"Channel Islands National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Channel_Islands_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-chico","title":"Chico, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Chico%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-clear-lake","title":"Clear Lake (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Clear_Lake_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-clouds-rest","title":"Clouds Rest – Wikipedia","url":"https://en.wikipedia.org/wiki/Clouds_Rest","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-coachella-valley","title":"Coachella Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/Coachella_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-colorado-river","title":"Colorado River – Wikipedia","url":"https://en.wikipedia.org/wiki/Colorado_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-crescent-city","title":"Crescent City, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Crescent_City%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-death-valley-np","title":"Death Valley National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Death_Valley_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-delta","title":"Sacramento–San Joaquin River Delta – Wikipedia","url":"https://en.wikipedia.org/wiki/Sacramento%E2%80%93San_Joaquin_River_Delta","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-devils-postpile","title":"Devils Postpile National Monument – Wikipedia","url":"https://en.wikipedia.org/wiki/Devils_Postpile_National_Monument","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-diablo-range","title":"Diablo Range – Wikipedia","url":"https://en.wikipedia.org/wiki/Diablo_Range","publisher":"Wikipedia","accessed":"2026-11-01","note":"The item uses an approximate centre of the range; Wikipedia's coordinate is San Benito Mountain in the southern half."},{"id":"wp-donner-pass","title":"Donner Pass – Wikipedia","url":"https://en.wikipedia.org/wiki/Donner_Pass","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-eel-river","title":"Eel River (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Eel_River_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-el-centro","title":"El Centro, California – Wikipedia","url":"https://en.wikipedia.org/wiki/El_Centro%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-emerald-triangle","title":"Emerald Triangle – Wikipedia","url":"https://en.wikipedia.org/wiki/Emerald_Triangle","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-eureka","title":"Eureka, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Eureka%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-feather-river","title":"Feather River – Wikipedia","url":"https://en.wikipedia.org/wiki/Feather_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-fort-ross","title":"Fort Ross, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Fort_Ross%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-fresno","title":"Fresno, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Fresno%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-friant-dam","title":"Friant Dam – Wikipedia","url":"https://en.wikipedia.org/wiki/Friant_Dam","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-golden-gate-bridge","title":"Golden Gate Bridge – Wikipedia","url":"https://en.wikipedia.org/wiki/Golden_Gate_Bridge","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-half-dome","title":"Half Dome – Wikipedia","url":"https://en.wikipedia.org/wiki/Half_Dome","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-hearst-castle","title":"Hearst Castle – Wikipedia","url":"https://en.wikipedia.org/wiki/Hearst_Castle","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-hetch-hetchy","title":"Hetch Hetchy – Wikipedia","url":"https://en.wikipedia.org/wiki/Hetch_Hetchy","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-hollywood-sign","title":"Hollywood Sign – Wikipedia","url":"https://en.wikipedia.org/wiki/Hollywood_Sign","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-humboldt-bay","title":"Humboldt Bay – Wikipedia","url":"https://en.wikipedia.org/wiki/Humboldt_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-imperial-valley","title":"Imperial Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/Imperial_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-independence","title":"Independence, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Independence%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-inland-empire","title":"Inland Empire – Wikipedia","url":"https://en.wikipedia.org/wiki/Inland_Empire","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-joshua-tree-np","title":"Joshua Tree National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Joshua_Tree_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-kern-river","title":"Kern River – Wikipedia","url":"https://en.wikipedia.org/wiki/Kern_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-kings-canyon-np","title":"Kings Canyon National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Kings_Canyon_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-kings-river","title":"Kings River (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Kings_River_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-klamath-mountains","title":"Klamath Mountains – Wikipedia","url":"https://en.wikipedia.org/wiki/Klamath_Mountains","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-klamath-river","title":"Klamath River – Wikipedia","url":"https://en.wikipedia.org/wiki/Klamath_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lake-berryessa","title":"Lake Berryessa – Wikipedia","url":"https://en.wikipedia.org/wiki/Lake_Berryessa","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lake-tahoe","title":"Lake Tahoe – Wikipedia","url":"https://en.wikipedia.org/wiki/Lake_Tahoe","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lassen-peak","title":"Lassen Peak – Wikipedia","url":"https://en.wikipedia.org/wiki/Lassen_Peak","publisher":"Wikipedia","accessed":"2026-11-01","note":"Article gives 10,457 ft citing NGS LT0688; that datasheet now reads 10,462 ft (VERTCON3), which the item uses."},{"id":"wp-lassen-volcanic-np","title":"Lassen Volcanic National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Lassen_Volcanic_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lava-beds","title":"Lava Beds National Monument – Wikipedia","url":"https://en.wikipedia.org/wiki/Lava_Beds_National_Monument","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lick-observatory","title":"Lick Observatory – Wikipedia","url":"https://en.wikipedia.org/wiki/Lick_Observatory","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-los-angeles","title":"Los Angeles – Wikipedia","url":"https://en.wikipedia.org/wiki/Los_Angeles","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-los-angeles-river","title":"Los Angeles River – Wikipedia","url":"https://en.wikipedia.org/wiki/Los_Angeles_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lost-coast","title":"Lost Coast – Wikipedia","url":"https://en.wikipedia.org/wiki/Lost_Coast","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-manzanar","title":"Manzanar – Wikipedia","url":"https://en.wikipedia.org/wiki/Manzanar","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-merced-river","title":"Merced River – Wikipedia","url":"https://en.wikipedia.org/wiki/Merced_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mission-carmel","title":"Mission San Carlos Borromeo de Carmelo – Wikipedia","url":"https://en.wikipedia.org/wiki/Mission_San_Carlos_Borromeo_de_Carmelo","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mission-sjc","title":"Mission San Juan Capistrano – Wikipedia","url":"https://en.wikipedia.org/wiki/Mission_San_Juan_Capistrano","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-modesto","title":"Modesto, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Modesto%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mojave-desert","title":"Mojave Desert – Wikipedia","url":"https://en.wikipedia.org/wiki/Mojave_Desert","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mojave-preserve","title":"Mojave National Preserve – Wikipedia","url":"https://en.wikipedia.org/wiki/Mojave_National_Preserve","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mono-lake","title":"Mono Lake – Wikipedia","url":"https://en.wikipedia.org/wiki/Mono_Lake","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-monterey","title":"Monterey, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Monterey%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-monterey-bay","title":"Monterey Bay – Wikipedia","url":"https://en.wikipedia.org/wiki/Monterey_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mount-diablo","title":"Mount Diablo – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Diablo","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mount-eddy","title":"Mount Eddy – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Eddy","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mount-hamilton","title":"Mount Hamilton (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Hamilton_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mount-lyell","title":"Mount Lyell (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Lyell_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01","note":"Infobox and NGS give 13,120 ft; the article lead says 13,114 ft. 13,120 used."},{"id":"wp-mount-ritter","title":"Mount Ritter – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Ritter","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mount-san-antonio","title":"Mount San Antonio – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_San_Antonio","publisher":"Wikipedia","accessed":"2026-11-01","note":"Infobox (The National Map) gives 10,068 ft; article lead gives 10,064 ft. 10,068 used."},{"id":"wp-mount-shasta","title":"Mount Shasta – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Shasta","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mount-tamalpais","title":"Mount Tamalpais – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Tamalpais","publisher":"Wikipedia","accessed":"2026-11-01","note":"Infobox gives 2,579 ft (Peakbagger); article text gives 2,571 ft for East Peak, the high point. 2,571 used; see ngs-ht3387."},{"id":"wp-mount-whitney","title":"Mount Whitney – Wikipedia","url":"https://en.wikipedia.org/wiki/Mount_Whitney","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-muir-woods","title":"Muir Woods National Monument – Wikipedia","url":"https://en.wikipedia.org/wiki/Muir_Woods_National_Monument","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-napa","title":"Napa, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Napa%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-napa-valley-ava","title":"Napa Valley AVA – Wikipedia","url":"https://en.wikipedia.org/wiki/Napa_Valley_AVA","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-needles","title":"Needles, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Needles%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-oakland","title":"Oakland, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Oakland%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-oroville-dam","title":"Oroville Dam – Wikipedia","url":"https://en.wikipedia.org/wiki/Oroville_Dam","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-owens-lake","title":"Owens Lake – Wikipedia","url":"https://en.wikipedia.org/wiki/Owens_Lake","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-owens-river","title":"Owens River – Wikipedia","url":"https://en.wikipedia.org/wiki/Owens_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-owens-valley","title":"Owens Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/Owens_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-palm-springs","title":"Palm Springs, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Palm_Springs%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-palomar-observatory","title":"Palomar Observatory – Wikipedia","url":"https://en.wikipedia.org/wiki/Palomar_Observatory","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-peninsular-ranges","title":"Peninsular Ranges – Wikipedia","url":"https://en.wikipedia.org/wiki/Peninsular_Ranges","publisher":"Wikipedia","accessed":"2026-11-01","note":"Wikipedia's coordinate sits at the Mexican border; the item uses an approximate centre of the California portion near the San Jacinto and Palomar mountains."},{"id":"wp-pine-flat-dam","title":"Pine Flat Dam – Wikipedia","url":"https://en.wikipedia.org/wiki/Pine_Flat_Dam","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-pinnacles-np","title":"Pinnacles National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Pinnacles_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-point-conception","title":"Point Conception – Wikipedia","url":"https://en.wikipedia.org/wiki/Point_Conception","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-point-reyes-ns","title":"Point Reyes National Seashore – Wikipedia","url":"https://en.wikipedia.org/wiki/Point_Reyes_National_Seashore","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-redding","title":"Redding, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Redding%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-redwood-nsp","title":"Redwood National and State Parks – Wikipedia","url":"https://en.wikipedia.org/wiki/Redwood_National_and_State_Parks","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-riverside","title":"Riverside, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Riverside%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-russian-river","title":"Russian River (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Russian_River_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sacramento","title":"Sacramento, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Sacramento%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sacramento-river","title":"Sacramento River – Wikipedia","url":"https://en.wikipedia.org/wiki/Sacramento_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sacramento-valley","title":"Sacramento Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/Sacramento_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-salinas-river","title":"Salinas River (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/Salinas_River_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-salinas-valley","title":"Salinas Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/Salinas_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-salton-sea","title":"Salton Sea – Wikipedia","url":"https://en.wikipedia.org/wiki/Salton_Sea","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-bernardino","title":"San Bernardino, California – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Bernardino%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-bernardino-mountains","title":"San Bernardino Mountains – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Bernardino_Mountains","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-diego","title":"San Diego – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Diego","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-francisco","title":"San Francisco – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-francisco-bay","title":"San Francisco Bay – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Francisco_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-gabriel-mountains","title":"San Gabriel Mountains – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Gabriel_Mountains","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-gorgonio","title":"San Gorgonio Mountain – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Gorgonio_Mountain","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-jacinto-peak","title":"San Jacinto Peak – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Jacinto_Peak","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-joaquin-river","title":"San Joaquin River – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Joaquin_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-joaquin-valley","title":"San Joaquin Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Joaquin_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-jose","title":"San Jose, California – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Jose%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-san-luis-obispo","title":"San Luis Obispo, California – Wikipedia","url":"https://en.wikipedia.org/wiki/San_Luis_Obispo%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-santa-barbara","title":"Santa Barbara, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Santa_Barbara%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-santa-cruz","title":"Santa Cruz, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Santa_Cruz%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-santa-cruz-mountains","title":"Santa Cruz Mountains – Wikipedia","url":"https://en.wikipedia.org/wiki/Santa_Cruz_Mountains","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-santa-lucia-range","title":"Santa Lucia Range – Wikipedia","url":"https://en.wikipedia.org/wiki/Santa_Lucia_Range","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sequoia-np","title":"Sequoia National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Sequoia_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-shasta-lake","title":"Shasta Lake – Wikipedia","url":"https://en.wikipedia.org/wiki/Shasta_Lake","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-shelter-cove","title":"Shelter Cove, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Shelter_Cove%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sierra-nevada","title":"Sierra Nevada – Wikipedia","url":"https://en.wikipedia.org/wiki/Sierra_Nevada","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-stockton","title":"Stockton, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Stockton%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sutters-fort","title":"Sutter's Fort – Wikipedia","url":"https://en.wikipedia.org/wiki/Sutter%27s_Fort","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sutters-mill","title":"Sutter's Mill – Wikipedia","url":"https://en.wikipedia.org/wiki/Sutter%27s_Mill","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-tehachapi-mountains","title":"Tehachapi Mountains – Wikipedia","url":"https://en.wikipedia.org/wiki/Tehachapi_Mountains","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-telescope-peak","title":"Telescope Peak – Wikipedia","url":"https://en.wikipedia.org/wiki/Telescope_Peak","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-tomales-bay","title":"Tomales Bay – Wikipedia","url":"https://en.wikipedia.org/wiki/Tomales_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-transverse-ranges","title":"Transverse Ranges – Wikipedia","url":"https://en.wikipedia.org/wiki/Transverse_Ranges","publisher":"Wikipedia","accessed":"2026-11-01","note":"Wikipedia's coordinate is San Gorgonio Mountain, the eastern high point; the item uses an approximate centre of the chain."},{"id":"wp-trinity-alps","title":"Trinity Alps – Wikipedia","url":"https://en.wikipedia.org/wiki/Trinity_Alps","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-truckee","title":"Truckee, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Truckee%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-tulare-lake","title":"Tulare Lake – Wikipedia","url":"https://en.wikipedia.org/wiki/Tulare_Lake","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-tuolumne-river","title":"Tuolumne River – Wikipedia","url":"https://en.wikipedia.org/wiki/Tuolumne_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-ukiah","title":"Ukiah, California – Wikipedia","url":"https://en.wikipedia.org/wiki/Ukiah%2C_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-white-mountain-peak","title":"White Mountain Peak – Wikipedia","url":"https://en.wikipedia.org/wiki/White_Mountain_Peak","publisher":"Wikipedia","accessed":"2026-11-01","note":"Infobox elevation 14,252 ft; confirmed against NGS datasheet HR2558 (14,252 ft NAVD 88)."},{"id":"wp-white-mountains","title":"White Mountains (California) – Wikipedia","url":"https://en.wikipedia.org/wiki/White_Mountains_%28California%29","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-yosemite-np","title":"Yosemite National Park – Wikipedia","url":"https://en.wikipedia.org/wiki/Yosemite_National_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-yosemite-valley","title":"Yosemite Valley – Wikipedia","url":"https://en.wikipedia.org/wiki/Yosemite_Valley","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sundial-bridge","title":"Sundial Bridge at Turtle Bay – Wikipedia","url":"https://en.wikipedia.org/wiki/Sundial_Bridge_at_Turtle_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-point-reyes","title":"Point Reyes – Wikipedia","url":"https://en.wikipedia.org/wiki/Point_Reyes","publisher":"Wikipedia","accessed":"2026-11-01","note":"Peninsula article: \"In the 1906 earthquake, Point Reyes moved north 21 ft (6.4 m).\""},{"id":"ngs-hr2558","title":"NGS datasheet HR2558 (14242, White Mountain Peak)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HR2558","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"NAVD 88 orthometric height 4344.1 m = 14,252 ft (VERTCON3); mark set in a boulder on the summit."},{"id":"ngs-ht3387","title":"NGS datasheet HT3387 (GARDNER LOOKOUT HOUSE, Mount Tamalpais East Peak)","url":"https://www.ngs.noaa.gov/cgi-bin/ds_mark.prl?PidBox=HT3387","publisher":"NOAA National Geodetic Survey","accessed":"2026-11-01","note":"Intersection station on top of the East Peak lookout; NAVD 88 height 2,575 ft (scaled). USGS topo/Wikipedia text give 2,571 ft for East Peak; Peakbagger (Wikipedia infobox) 2,579 ft."},{"id":"usgs-3dep-epqs","title":"USGS 3DEP Elevation Point Query Service","url":"https://epqs.nationalmap.gov/v1/json?x=-119.5329&y=37.746&units=Feet&wkid=4326","publisher":"U.S. Geological Survey","accessed":"2026-11-01","note":"Used as an independent elevation cross-check (1 m lidar DEM, max of a ±40 m grid around the summit): Half Dome 8,838; Mount Ritter 13,151; San Gorgonio 11,495; Mount San Antonio 10,068; Mount Diablo 3,846; Mount Tamalpais East Peak 2,573; Lassen Peak 10,450; San Jacinto 10,801 (lidar misses the boulder summit); Whitney 14,497."},{"id":"usgs-gnis","title":"USGS Geographic Names Information System – Domestic Names (California)","url":"https://edits.nationalmap.gov/apps/gaz-domestic/public/search/names","publisher":"U.S. Geological Survey","accessed":"2026-11-01","note":"Official feature coordinates (DomesticNames_CA, 2026 release). Used for city centre points (Truckee, Modesto, Anaheim), Santa Cruz Island, Lake Tahoe, Humboldt Bay, Big Sur and Hidden Valley (Joshua Tree)."},{"id":"usgs-nhd","title":"USGS National Hydrography Dataset flowlines (The National Map)","url":"https://hydro.nationalmap.gov/arcgis/rest/services/nhd/MapServer","publisher":"U.S. Geological Survey","accessed":"2026-11-01","note":"Used to confirm that river reference points lie on the named river (Owens River near Independence; Merced River in Yosemite Valley)."}],"items":[{"id":"ca-los-angeles","name":"Los Angeles","tier":1,"explanation":"Founded in 1781 by 44 settlers as El Pueblo de Nuestra Señora la Reina de los Ángeles, it is now the most populous city in California and second in the nation. It hosted the Summer Olympics in 1932 and 1984 and will again in 2028.","sources":["wp-los-angeles"],"aliases":["LA","L.A."],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":34.05,"lon":-118.25,"category":"city"},{"id":"ca-san-diego","name":"San Diego","tier":1,"explanation":"The 1769 presidio and mission here were the first European settlement in what is now California, which is why San Diego calls itself the state's birthplace. It is California's second-most populous city and a major US Navy base.","sources":["wp-san-diego"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":32.715,"lon":-117.1625,"category":"city"},{"id":"ca-sacramento","name":"Sacramento","tier":1,"explanation":"The state capital sits at the confluence of the Sacramento and American rivers; it became the permanent capital in 1854 after San Jose and other towns had hosted the legislature. With Stockton it is one of only two inland seaports in California.","sources":["wp-sacramento","wp-stockton"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS (0.07 km); inland-seaport claim sourced to the Stockton article; other claims re-read"}],"kind":"place","map":"ca","lat":38.5811,"lon":-121.4939,"category":"city"},{"id":"ca-san-francisco","name":"San Francisco","tier":1,"explanation":"Spanish settlers founded the Presidio and Mission Dolores on June 29, 1776, but it was the 1849 Gold Rush that made San Francisco the largest city on the West Coast. It has been a consolidated city-county since 1856.","sources":["wp-san-francisco"],"aliases":["SF"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":37.7775,"lon":-122.4164,"category":"city"},{"id":"ca-fresno","name":"Fresno","tier":2,"explanation":"Fresno is Spanish for ash tree, after the ash trees lining the San Joaquin River. Founded in 1872 as a Central Pacific railway stop, it is now the most populous inland city in California and the largest in the Central Valley.","sources":["wp-fresno"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":36.75,"lon":-119.7667,"category":"city"},{"id":"ca-san-jose","name":"San Jose","tier":1,"explanation":"Founded in 1777 as Pueblo de San José de Guadalupe, the first civilian town in the Californias, San Jose served as the state's first capital after statehood. Today it is the most populous city in the Bay Area and styles itself the Capital of Silicon Valley.","sources":["wp-san-jose"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":37.3361,"lon":-121.8906,"category":"city"},{"id":"ca-oakland","name":"Oakland","tier":1,"explanation":"Oakland's port is the busiest in Northern California and among the busiest container ports in the United States; the Central Pacific built its Long Wharf here in 1868. It is the East Bay's largest city and the Bay Area's third most populous.","sources":["wp-oakland"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":37.8044,"lon":-122.2708,"category":"city"},{"id":"ca-bakersfield","name":"Bakersfield","tier":2,"explanation":"At the southern end of the San Joaquin Valley, Bakersfield anchors Kern County, California's most productive oil county and one of the top farm counties in the US. It is also the birthplace of the twangy Bakersfield sound in country music.","sources":["wp-bakersfield"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":35.3733,"lon":-119.0189,"category":"city"},{"id":"ca-santa-barbara","name":"Santa Barbara","tier":2,"explanation":"Squeezed between the Santa Ynez Mountains and a rare south-facing stretch of coast, Santa Barbara has been dubbed the American Riviera for its Mediterranean climate and red-tile architecture.","sources":["wp-santa-barbara"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":34.4167,"lon":-119.7,"category":"city"},{"id":"ca-monterey","name":"Monterey","tier":2,"explanation":"Monterey was the capital of Alta California under Spain and Mexico from 1777 and hosted California's first constitutional convention in 1849. It sits at the southern end of Monterey Bay.","sources":["wp-monterey"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":36.6031,"lon":-121.8936,"category":"city"},{"id":"ca-santa-cruz","name":"Santa Cruz","tier":2,"explanation":"On the northern edge of Monterey Bay, Santa Cruz has been a seaside resort since its 1904 Beach Boardwalk and a college town since UC Santa Cruz opened in 1965. It is also one of the earliest surfing spots on the US mainland.","sources":["wp-santa-cruz"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":36.9719,"lon":-122.0264,"category":"city"},{"id":"ca-eureka","name":"Eureka","tier":3,"explanation":"On Humboldt Bay, Eureka is the largest coastal city between San Francisco and Portland and the westernmost US city of more than 25,000 people. Its lumber-boom Victorians, including the Carson Mansion, make the whole city a state historic landmark.","sources":["wp-eureka"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":40.8019,"lon":-124.1636,"category":"city"},{"id":"ca-redding","name":"Redding","tier":3,"explanation":"Redding is the hub of the Shasta Cascade region, on the Sacramento River about 160 miles north of the capital. Its Sundial Bridge, by architect Santiago Calatrava, doubles as a working sundial.","sources":["wp-redding","wp-sundial-bridge"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS (0.02 km); sundial claim sourced to the Sundial Bridge article; claims re-read"}],"kind":"place","map":"ca","lat":40.5864,"lon":-122.3917,"category":"city"},{"id":"ca-chico","name":"Chico","tier":3,"explanation":"The largest city in California north of Sacramento, Chico is a college town (Chico State) and home to Sierra Nevada Brewing, founded here in 1979. Bidwell Park, one of the largest urban parks in the world, runs from downtown into the foothills.","sources":["wp-chico"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS (1.3 km); \"city parks\" changed to \"urban parks\" per cited article; claims re-read"}],"kind":"place","map":"ca","lat":39.74,"lon":-121.8356,"category":"city"},{"id":"ca-stockton","name":"Stockton","tier":3,"explanation":"Founded in 1849 as a Gold Rush supply point, Stockton sits where the San Joaquin River meets the Delta, and ocean-going ships still reach its port. It and Sacramento are California's only inland seaports.","sources":["wp-stockton"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":37.9575,"lon":-121.2925,"category":"city"},{"id":"ca-modesto","name":"Modesto","tier":3,"explanation":"Modesto (Spanish for modest) is a farm-belt city in the San Joaquin Valley and the hometown of George Lucas, whose 1973 film American Graffiti immortalised its cruising culture.","sources":["wp-modesto","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":37.6391,"lon":-120.9969,"category":"city"},{"id":"ca-palm-springs","name":"Palm Springs","tier":2,"explanation":"A desert resort in the Coachella Valley, Palm Springs grew as a Hollywood retreat and is known for its mid-century modern architecture. Its population roughly triples each winter with seasonal residents.","sources":["wp-palm-springs"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":33.8303,"lon":-116.5453,"category":"city"},{"id":"ca-san-bernardino","name":"San Bernardino","tier":3,"explanation":"The twin city of Riverside at the heart of the Inland Empire, San Bernardino was where Richard and Maurice McDonald opened the first McDonald's in 1940. The site is now a Route 66 museum.","sources":["wp-san-bernardino"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":34.1042,"lon":-117.2922,"category":"city"},{"id":"ca-anaheim","name":"Anaheim","tier":2,"explanation":"Founded by fifty German families in 1857, Anaheim stayed agricultural until Disneyland opened on July 17, 1955. It is Orange County's most populous city and home to the Angels and the Ducks.","sources":["wp-anaheim","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":33.8353,"lon":-117.9145,"category":"city"},{"id":"ca-san-luis-obispo","name":"San Luis Obispo","tier":3,"explanation":"Roughly halfway between the Bay Area and Los Angeles, San Luis Obispo grew up around the mission Junípero Serra founded in 1772. It is home to Cal Poly and to Bubblegum Alley, a lane walled in chewed gum since about 1960.","sources":["wp-san-luis-obispo"],"aliases":["SLO"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":35.2742,"lon":-120.6631,"category":"city"},{"id":"ca-napa","name":"Napa","tier":3,"explanation":"The county seat and largest city of Napa County sits at the southern end of the valley; steamboats were running the Napa River by 1850 and the county's first commercial winery opened in 1859.","sources":["wp-napa"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":38.3047,"lon":-122.2989,"category":"city"},{"id":"ca-truckee","name":"Truckee","tier":3,"explanation":"A railroad town at nearly 6,000 feet near Donner Pass, Truckee is where the snowbound Donner Party spent the winter of 1846–47. The transcontinental railroad reached it in 1868 and Amtrak still stops downtown.","sources":["wp-truckee","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates snapped to GNIS downtown point (was 3.2 km north); elevation wording corrected (article 5,899 ft, GNIS 6,152 ft); claims re-read"}],"kind":"place","map":"ca","lat":39.328,"lon":-120.1833,"category":"city"},{"id":"ca-bishop","name":"Bishop","tier":3,"explanation":"The only incorporated city in Inyo County, Bishop sits at 4,150 feet near the north end of the Owens Valley, named for Bishop Creek and settler Samuel Bishop. It is the gateway town for the eastern Sierra.","sources":["wp-bishop"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":37.3667,"lon":-118.3958,"category":"city"},{"id":"ca-barstow","name":"Barstow","tier":3,"explanation":"A Mojave Desert crossroads that grew up on the railroad; its 1911 Harvey House hotel, the Casa del Desierto, now holds a Route 66 museum and still serves Amtrak.","sources":["wp-barstow"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":34.9,"lon":-117.0167,"category":"city"},{"id":"ca-crescent-city","name":"Crescent City","tier":4,"explanation":"The only incorporated city in Del Norte County, near the Oregon line, Crescent City is headquarters for Redwood National Park. Its offshore geography funnels tsunamis: the 1964 Alaska earthquake destroyed much of the town.","sources":["wp-crescent-city"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":41.7561,"lon":-124.2017,"category":"city"},{"id":"ca-needles","name":"Needles","tier":4,"explanation":"On the Colorado River where California meets Arizona and Nevada, Needles was a Route 66 stop with a July mean temperature of 98.5 °F; in 2012 it recorded rain falling at 115 °F, the hottest rain ever measured.","sources":["wp-needles"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS (0.01 km); unsupported \"one of the hottest towns\" replaced with the article’s July mean; claims re-read"}],"kind":"place","map":"ca","lat":34.8481,"lon":-114.6142,"category":"city"},{"id":"ca-el-centro","name":"El Centro","tier":4,"explanation":"El Centro, the seat of Imperial County, lies about 42 feet below sea level, making it the most populous US city entirely below sea level. It is less than 20 miles from Mexicali.","sources":["wp-el-centro"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":32.8,"lon":-115.5667,"category":"city"},{"id":"ca-ukiah","name":"Ukiah","tier":4,"explanation":"The seat of Mendocino County on the US 101 corridor, Ukiah takes its name from the Pomo village Yokáya, meaning deep valley. The railroad from San Francisco reached it in 1889.","sources":["wp-ukiah"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS populated-place point (all within 3.3 km; snapped Truckee/Modesto/Anaheim to GNIS downtown); every claim re-read in the cited Wikipedia article text (fetched 2026-11-01)"}],"kind":"place","map":"ca","lat":39.1503,"lon":-123.2078,"category":"city"},{"id":"ca-yosemite","name":"Yosemite National Park","tier":1,"explanation":"Abraham Lincoln signed the Yosemite Grant in 1864, handing Yosemite Valley and the Mariposa Grove to California for preservation; the national park followed in 1890. Its granite walls, waterfalls and giant sequoias earned World Heritage status in 1984.","sources":["wp-yosemite-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.85,"lon":-119.5167,"category":"national-park","toleranceKm":60},{"id":"ca-sequoia-np","name":"Sequoia National Park","tier":2,"explanation":"Established in 1890, Sequoia protects the General Sherman Tree, the largest tree on Earth by volume, and spans nearly 13,000 feet of relief up to Mount Whitney. It is run jointly with Kings Canyon.","sources":["wp-sequoia-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.5647,"lon":-118.7728,"category":"national-park","toleranceKm":50},{"id":"ca-kings-canyon-np","name":"Kings Canyon National Park","tier":3,"explanation":"Born in 1890 as tiny General Grant National Park, it was expanded and renamed in 1940. Its namesake canyon drops as much as 8,200 feet from rim to river, deeper than the Grand Canyon.","sources":["wp-kings-canyon-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.7893,"lon":-118.6729,"category":"national-park","toleranceKm":50},{"id":"ca-death-valley","name":"Death Valley National Park","tier":1,"explanation":"The largest national park in the lower 48 is also the hottest, driest and lowest: Badwater Basin lies 282 feet below sea level, and Furnace Creek hit 134 °F in 1913. Mount Whitney is only 85 miles away.","sources":["wp-death-valley-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.45,"lon":-116.85,"category":"national-park","toleranceKm":70,"hint":"Point = Furnace Creek area"},{"id":"ca-joshua-tree","name":"Joshua Tree National Park","tier":1,"explanation":"Two deserts meet here: the higher Mojave, where the namesake yuccas grow, and the lower Colorado Desert. A national monument from 1936, it became a park under the 1994 California Desert Protection Act.","sources":["wp-joshua-tree-np","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"old point reverse-geocoded to the town of Joshua Tree outside the park; moved to GNIS Hidden Valley, confirmed inside the park polygon via Overpass; claims re-read"}],"kind":"place","map":"ca","lat":34.0219,"lon":-116.1808,"category":"national-park","toleranceKm":60,"hint":"Point = Hidden Valley, inside the park"},{"id":"ca-redwood-np","name":"Redwood National and State Parks","tier":2,"explanation":"One national park and three state parks together protect 45 percent of all remaining old-growth coast redwood, the tallest tree species on Earth. Park headquarters are in Crescent City.","sources":["wp-redwood-nsp"],"aliases":["Redwood National Park"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":41.3,"lon":-124,"category":"national-park","toleranceKm":60},{"id":"ca-lassen-volcanic","name":"Lassen Volcanic National Park","tier":2,"explanation":"One of the few places on Earth with all four volcano types, Lassen was made a park in 1916 while its peak was still erupting (1914–1921). Bumpass Hell's boiling mudpots show the heat is still there.","sources":["wp-lassen-volcanic-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":40.4981,"lon":-121.4275,"category":"national-park","toleranceKm":50},{"id":"ca-pinnacles","name":"Pinnacles National Park","tier":3,"explanation":"The spires are the eroded half of an extinct volcano that the San Andreas Fault has carried about 200 miles from its other half. A monument since 1908, it became a park in 2013 and is a release site for captive-bred California condors.","sources":["wp-pinnacles-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.4869,"lon":-121.1669,"category":"national-park"},{"id":"ca-channel-islands","name":"Channel Islands National Park","tier":2,"explanation":"Five of the eight Channel Islands off Santa Barbara make up the park, home to the island fox, found nowhere else. Santa Cruz Island, the largest, is shared with The Nature Conservancy.","sources":["wp-channel-islands-np","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point moved onto Santa Cruz Island (GNIS island point; Overpass confirms inside island/Nature Conservancy area); claims re-read in cited text"}],"kind":"place","map":"ca","lat":34.0403,"lon":-119.8437,"category":"national-park","toleranceKm":60,"hint":"Point = Santa Cruz Island"},{"id":"ca-point-reyes","name":"Point Reyes National Seashore","tier":2,"explanation":"The peninsula is split from the rest of the continent by the San Andreas Fault rift zone; the peninsula lurched 21 feet north in the 1906 earthquake. Established in 1962, it is the only US park outside Alaska with both breeding elk and elephant seals.","sources":["wp-point-reyes-ns","wp-point-reyes"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata (0.03 km) and inside park via Overpass; unsupported 18-ft fence claim replaced with the 21-ft 1906 offset from the Point Reyes article"}],"kind":"place","map":"ca","lat":38.0667,"lon":-122.8833,"category":"national-park"},{"id":"ca-muir-woods","name":"Muir Woods National Monument","tier":2,"explanation":"William Kent bought this redwood canyon on Mount Tamalpais in 1905 to stop logging, and in 1908 Theodore Roosevelt made it a national monument named for John Muir. Just 12 miles from San Francisco, it holds one of the last old-growth redwood stands in the Bay Area.","sources":["wp-muir-woods"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.8919,"lon":-122.5708,"category":"national-park"},{"id":"ca-devils-postpile","name":"Devils Postpile National Monument","tier":4,"explanation":"A wall of columnar basalt near Mammoth Mountain, saved in 1911 when John Muir and others persuaded Washington to halt its planned demolition. The John Muir and Pacific Crest trails merge as they pass through.","sources":["wp-devils-postpile"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.6244,"lon":-119.0844,"category":"national-park"},{"id":"ca-lava-beds","name":"Lava Beds National Monument","tier":3,"explanation":"On the flank of Medicine Lake Volcano, the Cascades' largest by area, Lava Beds has dozens of lava tubes you can walk into. It was the battleground of the 1872–73 Modoc War, where Captain Jack's band held off the US Army.","sources":["wp-lava-beds"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":41.7139,"lon":-121.5083,"category":"national-park"},{"id":"ca-mojave-preserve","name":"Mojave National Preserve","tier":3,"explanation":"Created in 1994, this 1.5-million-acre preserve between I-15 and I-40 is the largest national preserve in the country and the third-largest park-service unit in the lower 48. Highlights include the singing Kelso Dunes and the Cima Dome's Joshua trees.","sources":["wp-mojave-preserve"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":34.8833,"lon":-115.7167,"category":"national-park","toleranceKm":70},{"id":"ca-cabrillo","name":"Cabrillo National Monument","tier":3,"explanation":"At the tip of Point Loma, it marks where Juan Rodríguez Cabrillo landed on September 28, 1542, the first European to set foot on the future US West Coast. The Old Point Loma Lighthouse, lit in 1855, crowns the park.","sources":["wp-cabrillo-nm"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point confirmed inside the park polygon (OpenStreetMap/Overpass is_in) and vs Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":32.6731,"lon":-117.2386,"category":"national-park"},{"id":"ca-mount-whitney","name":"Mount Whitney","tier":1,"explanation":"At 14,505 feet the highest point in the contiguous United States, Whitney is the southern end of the John Muir Trail and the eastern edge of Sequoia National Park. Badwater Basin, the continent's lowest point, is only 85 miles away.","sources":["wp-mount-whitney","ngs-gt1811","wp-death-valley-np"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"summit coordinates vs USGS GNIS summit (<0.2 km); elevation vs NGS datasheet and USGS 3DEP lidar; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.5786,"lon":-118.292,"category":"mountain","elevationFt":14505},{"id":"ca-mount-shasta","name":"Mount Shasta","tier":1,"explanation":"A 14,179-foot stratovolcano at the southern end of the Cascades, Shasta is the most voluminous volcano in the Cascade arc and California's fifth-highest peak. 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NGS now puts the summit at 10,462 feet; the park’s familiar figure is 10,457.","sources":["wp-lassen-peak","ngs-lt0688"],"aliases":["Mount Lassen"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS summit (0.02 km); elevation set to NGS LT0688 10,462 ft (datasheet re-read; Wikipedia 10,457); claims re-read in cited text"}],"kind":"place","map":"ca","lat":40.4881,"lon":-121.505,"category":"mountain","elevationFt":10462},{"id":"ca-mount-tamalpais","name":"Mount Tamalpais","tier":2,"explanation":"Marin County's 2,571-foot landmark, Mount Tam is where Gary Fisher, Joe Breeze and friends invented mountain biking in the 1970s. Muir Woods sits on its lower slopes.","sources":["wp-mount-tamalpais","ngs-ht3387","usgs-3dep-epqs"],"aliases":["Mount Tam"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates confirmed as East Peak via OpenStreetMap peak node (37.9290,-122.5777) and NGS HT3387 (Gardner Lookout on East Peak); GNIS \"Mount Tamalpais\" point is West Peak. 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The ancient bristlecone pines, including Methuselah, the oldest known living tree, grow in the same range.","sources":["wp-white-mountain-peak","wp-white-mountains","ngs-hr2558"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS summit (0.01 km); elevation confirmed against NGS HR2558 (14,252 ft); claims re-read in both cited articles"}],"kind":"place","map":"ca","lat":37.6341,"lon":-118.2557,"category":"mountain","elevationFt":14252},{"id":"ca-mount-hamilton","name":"Mount Hamilton","tier":4,"explanation":"The 4,265-foot peak east of San Jose carries Lick Observatory, the world's first permanently staffed mountaintop observatory; the summit was leveled for it, and the quoted height is that of the observatory's small dome. On clear days Yosemite is visible from the summit.","sources":["wp-mount-hamilton","ngs-hs4865"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS summit (0.01 km); NGS HS4865 re-read (dome station) and HS4863 ground mark noted; claims re-read"}],"kind":"place","map":"ca","lat":37.3417,"lon":-121.6428,"category":"mountain","elevationFt":4265},{"id":"ca-mount-lyell","name":"Mount Lyell","tier":4,"explanation":"Yosemite's highest point at about 13,120 feet, named for geologist Charles Lyell. Its Lyell Glacier was one of the park's last, and is now considered a stagnant ice field rather than a moving glacier.","sources":["wp-mount-lyell","ngs-hr2884"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"summit coordinates vs USGS GNIS summit (<0.2 km); elevation vs NGS datasheet and USGS 3DEP lidar; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.7394,"lon":-119.2716,"category":"mountain","elevationFt":13120},{"id":"ca-mount-ritter","name":"Mount Ritter","tier":4,"explanation":"The 13,149-foot high point of the Ritter Range in the Ansel Adams Wilderness, and the tallest peak in Madera County; Banner Peak and the Minarets are its neighbours.","sources":["wp-mount-ritter","usgs-3dep-epqs"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS summit (0.07 km); elevation vs USGS 3DEP max 13,151 ft; unsupported Muir 1872 claim removed"}],"kind":"place","map":"ca","lat":37.6894,"lon":-119.199,"category":"mountain","elevationFt":13149},{"id":"ca-mount-eddy","name":"Mount Eddy","tier":5,"explanation":"Across I-5 from Mount Shasta, 9,037-foot Mount Eddy is the highest point in the Klamath Mountains and the highest summit west of Interstate 5 in the United States. It is built of serpentinised peridotite, rock from the Earth's mantle.","sources":["wp-mount-eddy","ngs-mx1043"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"summit coordinates vs USGS GNIS summit (<0.2 km); elevation vs NGS datasheet and USGS 3DEP lidar; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":41.3196,"lon":-122.479,"category":"mountain","elevationFt":9037},{"id":"ca-clouds-rest","name":"Clouds Rest","tier":4,"explanation":"A knife-edge arête of 9,930 feet carved by the glaciers that cut Tenaya Canyon and Little Yosemite Valley; its northwest face rises 5,000 feet above Tenaya Creek, and its nearness to the valley makes it one of Yosemite’s most prominent viewpoints.","sources":["wp-clouds-rest","ngs-hr2868"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS summit (0.01 km); elevation vs NGS HR2868; unsupported Half Dome/day-hike wording replaced with sourced facts"}],"kind":"place","map":"ca","lat":37.7679,"lon":-119.4892,"category":"mountain","elevationFt":9930},{"id":"ca-sierra-nevada","name":"Sierra Nevada","tier":1,"explanation":"The Sierra runs 400 miles between the Central Valley and the Great Basin and holds Mount Whitney, Lake Tahoe, Yosemite and the General Sherman Tree. The range is 50 to 80 miles wide.","sources":["wp-sierra-nevada"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"centre point reverse-geocoded to Tuolumne County high Sierra; unsupported \"Range of Light\" attribution removed; remaining claims re-read"}],"kind":"place","map":"ca","lat":38,"lon":-119.5,"category":"range","toleranceKm":120,"hint":"Approximate center of the range"},{"id":"ca-cascade-range","name":"Cascade Range (California)","tier":2,"explanation":"The volcanic Cascades run from British Columbia to end at Lassen Peak; the two most recent Cascade eruptions were Lassen (1914–21) and Mount St. Helens. California's share is dominated by Shasta and Lassen.","sources":["wp-cascade-range"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"centre point reverse-geocoded to Shasta County between Shasta and Lassen; unsupported 700-mile figure removed; remaining claims re-read"}],"kind":"place","map":"ca","lat":40.95,"lon":-121.85,"category":"range","toleranceKm":100,"hint":"Approximate center of the California portion, between Shasta and Lassen"},{"id":"ca-transverse-ranges","name":"Transverse Ranges","tier":3,"explanation":"Most California ranges trend northwest–southeast; these run east–west across Southern California from Point Conception into the desert, hence the name. San Gorgonio Mountain is their high point.","sources":["wp-transverse-ranges","wp-san-gorgonio"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"centre point reverse-geocoded to Santa Clarita within the province; high-point claim sourced to San Gorgonio article"}],"kind":"place","map":"ca","lat":34.35,"lon":-118.5,"category":"range","toleranceKm":120,"hint":"Approximate center; the chain runs east–west from Point Conception to the desert"},{"id":"ca-peninsular-ranges","name":"Peninsular Ranges","tier":3,"explanation":"A 930-mile chain that starts in Southern California and forms the spine of the Baja California peninsula. San Jacinto Peak is the highest point; the Santa Ana, San Jacinto and Laguna mountains are all part of it.","sources":["wp-peninsular-ranges","wp-san-jacinto-peak"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"centre point reverse-geocoded to San Diego County backcountry; high-point claim sourced to San Jacinto Peak article"}],"kind":"place","map":"ca","lat":33.3,"lon":-116.7,"category":"range","toleranceKm":100,"hint":"Approximate center of the California portion"},{"id":"ca-klamath-mountains","name":"Klamath Mountains","tier":3,"explanation":"A rugged, lightly populated range across northwestern California and southwestern Oregon, noted for serpentine and marble geology and one of the richest conifer collections on Earth. The Trinity Alps are a subrange; Mount Eddy is the high point.","sources":["wp-klamath-mountains"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":41.32,"lon":-122.479,"category":"range","toleranceKm":100,"hint":"Point = Mount Eddy, the high point"},{"id":"ca-tehachapi-mountains","name":"Tehachapi Mountains","tier":4,"explanation":"A 40-mile range dividing the San Joaquin Valley from the Mojave Desert; I-5 climbs it on the Grapevine and trains loop over themselves on the famous Tehachapi Loop. Prevailing winds funnel up its canyons from the San Joaquin Valley.","sources":["wp-tehachapi-mountains"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":34.95,"lon":-118.58,"category":"range","toleranceKm":80},{"id":"ca-san-gabriel-mountains","name":"San Gabriel Mountains","tier":2,"explanation":"The wall between the Los Angeles Basin and the Mojave, bounded on the north by the San Andreas Fault. Mount Baldy is the high point and Mount Wilson carries the observatory and LA's broadcast towers.","sources":["wp-san-gabriel-mountains"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":34.2889,"lon":-117.6467,"category":"range","toleranceKm":80,"hint":"Point = Mount Baldy, the high point"},{"id":"ca-san-bernardino-mountains","name":"San Bernardino Mountains","tier":3,"explanation":"A Transverse Range rising to 11,503 feet at San Gorgonio, formed by movement on the San Andreas Fault and still rising. Its upland plateau holds Big Bear Lake and Lake Arrowhead.","sources":["wp-san-bernardino-mountains"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":34.2,"lon":-117,"category":"range","toleranceKm":80},{"id":"ca-santa-lucia-range","name":"Santa Lucia Range","tier":3,"explanation":"The Big Sur mountains run 140 miles from Carmel to the Cuyama River and never stray more than 11 miles from the sea, forming the steepest coastal slope in the lower 48. Cone Peak rises 5,158 feet just three miles from the ocean.","sources":["wp-santa-lucia-range"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.0511,"lon":-121.4691,"category":"range","toleranceKm":90},{"id":"ca-diablo-range","name":"Diablo Range","tier":3,"explanation":"An inner Coast Range running from the East Bay to the Salinas Valley, crossed by Altamont Pass. Mount Diablo gives it its name but 5,241-foot San Benito Mountain is the high point.","sources":["wp-diablo-range"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"centre point reverse-geocoded to the Pacheco Pass area (Merced County); unsupported 180-mile figure removed; remaining claims re-read"}],"kind":"place","map":"ca","lat":37,"lon":-121.2,"category":"range","toleranceKm":120,"hint":"Approximate center, roughly east of Gilroy and Hollister"},{"id":"ca-santa-cruz-mountains","name":"Santa Cruz Mountains","tier":3,"explanation":"The ridge down the San Francisco Peninsula that separates the Pacific from the Bay and Santa Clara Valley, ending at the Pajaro River. The range runs through San Mateo, Santa Clara and Santa Cruz counties.","sources":["wp-santa-cruz-mountains"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.1167,"lon":-121.85,"category":"range","toleranceKm":80,"hint":"Point = near Loma Prieta"},{"id":"ca-white-mountains","name":"White Mountains","tier":4,"explanation":"A 60-mile fault-block range facing the Sierra across the Owens Valley, topping out at 14,252-foot White Mountain Peak. Its dry dolomite slopes grow the Great Basin bristlecone pines, the oldest known trees.","sources":["wp-white-mountains"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point checked against GNIS/Wikidata and reverse-geocoded (Nominatim/Overpass) to confirm it lies within the range as the hint states; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.5833,"lon":-118.2675,"category":"range","toleranceKm":80},{"id":"ca-trinity-alps","name":"Trinity Alps","tier":4,"explanation":"A granite subrange of the Klamath Mountains north of Weaverville, rising to 9,001 feet on Thompson Peak. Its north side held the range’s last tiny glaciers until the Grizzly Glacier was declared extinct in 2022.","sources":["wp-trinity-alps"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS range point (0.00 km); glacier claim updated (Grizzly Glacier declared extinct 2022 per cited article)"}],"kind":"place","map":"ca","lat":41.0004,"lon":-123.0484,"category":"range","toleranceKm":80},{"id":"ca-sacramento-river","name":"Sacramento River","tier":1,"explanation":"California's largest river rises near Mount Shasta and flows 400 miles to the Delta and San Francisco Bay, draining the Sacramento Valley. Shasta Dam impounds it, and it once carried one of the continent's southernmost big Chinook salmon runs.","sources":["wp-sacramento-river","wp-sacramento"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.5811,"lon":-121.4939,"category":"river","toleranceKm":80,"hint":"Point = the state capital, which sits on its bank"},{"id":"ca-san-joaquin-river","name":"San Joaquin River","tier":2,"explanation":"Central California's longest river at 366 miles, it leaves the Sierra at Friant Dam north of Fresno and is so heavily diverted that it used to run dry for 60 miles below the dam.","sources":["wp-san-joaquin-river","wp-friant-dam"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.0006,"lon":-119.7053,"category":"river","toleranceKm":70,"hint":"Point = Friant Dam, where the river leaves the foothills north of Fresno"},{"id":"ca-american-river","name":"American River","tier":2,"explanation":"James Marshall found gold on its South Fork at Coloma in 1848, setting off the Gold Rush. The river meets the Sacramento in downtown Sacramento.","sources":["wp-american-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.5975,"lon":-121.5081,"category":"river","toleranceKm":50,"hint":"Point = confluence with the Sacramento River at Sacramento"},{"id":"ca-feather-river","name":"Feather River","tier":3,"explanation":"The Sacramento's main tributary, formed where four forks meet in Lake Oroville behind the 770-foot Oroville Dam, the tallest in the US. Since the 1960s it has been the main source for the State Water Project that supplies Southern California.","sources":["wp-feather-river","wp-oroville-dam"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":39.5389,"lon":-121.4856,"category":"river","toleranceKm":60,"hint":"Point = Oroville Dam"},{"id":"ca-kern-river","name":"Kern River","tier":3,"explanation":"Fed by snowmelt near Mount Whitney, the Kern is the only major Sierra river that drains south, running about 165 miles through whitewater canyons to Bakersfield, where it once filled the now-dry Buena Vista and Kern lakes.","sources":["wp-kern-river","wp-bakersfield"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":35.3733,"lon":-119.0189,"category":"river","toleranceKm":60,"hint":"Point = Bakersfield"},{"id":"ca-kings-river","name":"Kings River","tier":3,"explanation":"Rising on the Sierra crest, the Kings carves Kings Canyon, one of North America's deepest gorges, before Pine Flat Dam (1954) tames it east of Fresno. Historically it fed Tulare Lake.","sources":["wp-kings-river","wp-pine-flat-dam"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.8322,"lon":-119.3261,"category":"river","toleranceKm":60,"hint":"Point = Pine Flat Dam, east of Fresno"},{"id":"ca-merced-river","name":"Merced River","tier":3,"explanation":"The river of Yosemite Valley: glaciers following its course carved the valley, and below the mountains it meanders 145 miles across farmland to the San Joaquin.","sources":["wp-merced-river","wp-yosemite-valley","usgs-nhd"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point confirmed on the Merced River in Yosemite Valley using USGS NHD flowline geometry and inside Yosemite NP via Overpass; claims re-read"}],"kind":"place","map":"ca","lat":37.7217,"lon":-119.6464,"category":"river","toleranceKm":60,"hint":"Point = the river at the west end of Yosemite Valley"},{"id":"ca-tuolumne-river","name":"Tuolumne River","tier":3,"explanation":"From Tuolumne Meadows the river drops nearly a mile into Hetch Hetchy Reservoir, which has supplied San Francisco's drinking water since 1934, then runs 149 miles to join the San Joaquin west of Modesto.","sources":["wp-tuolumne-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.6058,"lon":-121.1736,"category":"river","toleranceKm":60,"hint":"Point = its mouth on the San Joaquin, west of Modesto"},{"id":"ca-klamath-river","name":"Klamath River","tier":2,"explanation":"A 257-mile river from Oregon's high desert to the redwood coast, the Klamath is the third-largest salmon and steelhead river on the West Coast. Four hydroelectric dams were demolished by 2024 after nearly two decades of negotiation among tribes, conservationists and the utility.","sources":["wp-klamath-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":41.5469,"lon":-124.0833,"category":"river","toleranceKm":70,"hint":"Point = its mouth at Requa"},{"id":"ca-eel-river","name":"Eel River","tier":3,"explanation":"The third-largest watershed entirely within California, the Eel flows 196 miles north through the Coast Ranges to the sea just south of Humboldt Bay. Federal Wild and Scenic status since 1981 bars new dams.","sources":["wp-eel-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":40.6414,"lon":-124.3122,"category":"river","toleranceKm":60,"hint":"Point = its mouth near Ferndale"},{"id":"ca-russian-river","name":"Russian River","tier":3,"explanation":"Named for the Russian-American Company, whose Fort Ross stood ten miles from its mouth, the Russian drains Sonoma and Mendocino wine country for 115 miles to the Pacific at Jenner. It is the Bay Area's second-largest river after the Sacramento.","sources":["wp-russian-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.4506,"lon":-123.1294,"category":"river","toleranceKm":50,"hint":"Point = its mouth at Jenner"},{"id":"ca-salinas-river","name":"Salinas River","tier":3,"explanation":"The longest river of the Central Coast runs 175 miles north-northwest, an unusual direction, down the Salinas Valley to Monterey Bay. The valley it drains is so productive it is nicknamed America's Salad Bowl.","sources":["wp-salinas-river","wp-salinas-valley"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.7494,"lon":-121.8036,"category":"river","toleranceKm":60,"hint":"Point = its mouth on Monterey Bay"},{"id":"ca-los-angeles-river","name":"Los Angeles River","tier":2,"explanation":"The river the pueblo was founded beside now runs 51 miles from Canoga Park to Long Beach almost entirely in a concrete flood-control channel, built after devastating floods in the early twentieth century.","sources":["wp-los-angeles-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":33.7564,"lon":-118.1889,"category":"river","toleranceKm":50,"hint":"Point = its mouth at Long Beach"},{"id":"ca-colorado-river","name":"Colorado River (California border)","tier":2,"explanation":"The 1,450-mile Colorado forms California's border with Arizona. At Imperial Dam over 90 percent of its remaining flow is diverted, much of it into the All-American Canal that irrigates the Imperial Valley.","sources":["wp-colorado-river","wp-blythe"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"reference point vs GNIS/Wikidata point for the named mouth, dam or town (<1.5 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":33.6103,"lon":-114.5964,"category":"river","toleranceKm":80,"hint":"Point = Blythe, on the California bank"},{"id":"ca-owens-river","name":"Owens River","tier":3,"explanation":"The 183-mile river of the Owens Valley was the prize in the California Water Wars: since 1913 the Los Angeles Aqueduct has diverted most of it to the city, drying Owens Lake and gutting the valley's farm economy.","sources":["wp-owens-river","wp-independence","usgs-nhd"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point moved onto the Owens River east of Independence using USGS NHD flowline geometry; claims re-read in cited text"}],"kind":"place","map":"ca","lat":36.8222,"lon":-118.1403,"category":"river","toleranceKm":60,"hint":"Point = the river about 3.5 miles northeast of Independence, the Inyo County seat"},{"id":"ca-lake-tahoe","name":"Lake Tahoe","tier":1,"explanation":"At 6,225 feet, Tahoe is North America's largest alpine lake and, at 1,645 feet deep, the second-deepest in the US after Crater Lake. Only the Great Lakes hold more water.","sources":["wp-lake-tahoe","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point moved from the NV state-line corner to the GNIS/Wikidata lake centre (Overpass confirms in Lake Tahoe water); claims re-read"}],"kind":"place","map":"ca","lat":39.0961,"lon":-120.0334,"category":"lake"},{"id":"ca-mono-lake","name":"Mono Lake","tier":2,"explanation":"A saline soda lake at least 760,000 years old with no outlet, famous for its tufa towers and the two million migratory birds that feed on its brine shrimp. Los Angeles diverted its feeder streams from 1941, dropping the lake until the Audubon Society's court battle curbed the diversions.","sources":["wp-mono-lake"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS lake/reservoir point and Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.0166,"lon":-119.0093,"category":"lake"},{"id":"ca-clear-lake","name":"Clear Lake","tier":3,"explanation":"The largest natural freshwater lake entirely within California (Tahoe is shared with Nevada), with 68 square miles of surface. At roughly half a million years it is thought to be one of the oldest lakes in North America.","sources":["wp-clear-lake"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS lake/reservoir point and Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":39.0616,"lon":-122.8272,"category":"lake"},{"id":"ca-salton-sea","name":"Salton Sea","tier":2,"explanation":"California's largest lake by area is an accident: in 1905 the flooding Colorado River broke through an irrigation cut and poured into the Salton Trough. Now shrinking and ever saltier, its exposed bed blows toxic dust.","sources":["wp-salton-sea"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS lake/reservoir point and Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":33.3131,"lon":-115.8344,"category":"lake","toleranceKm":50},{"id":"ca-shasta-lake","name":"Shasta Lake","tier":2,"explanation":"The state's largest reservoir, created when Shasta Dam blocked the Sacramento River in 1944 as the keystone of the Central Valley Project. It has 365 miles of shoreline and drowned the mining town of Kennett.","sources":["wp-shasta-lake"],"aliases":["Lake Shasta"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS lake/reservoir point and Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":40.7602,"lon":-122.3719,"category":"lake"},{"id":"ca-lake-berryessa","name":"Lake Berryessa","tier":3,"explanation":"Napa County's largest lake, formed by Monticello Dam on Putah Creek in the 1950s. Its 72-foot bell-mouth spillway, the Glory Hole, swallows the lake whole when it overflows, as it did in 2017.","sources":["wp-lake-berryessa"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS lake/reservoir point and Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.59,"lon":-122.23,"category":"lake"},{"id":"ca-owens-lake","name":"Owens Lake (dry)","tier":3,"explanation":"A real lake until 1913, when Los Angeles diverted the Owens River; it was dry by 1926 and became the largest single source of dust pollution in the United States. Since 2006 a court order has returned a trickle of river flow, and dust-control works now cover much of the bed.","sources":["wp-owens-lake"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs GNIS (0.27 km); dust-control wording aligned with cited article"}],"kind":"place","map":"ca","lat":36.4332,"lon":-117.9509,"category":"lake"},{"id":"ca-tulare-lake","name":"Tulare Lake (historic)","tier":4,"explanation":"Once the largest freshwater lake west of the Mississippi by area, Tulare Lake was drained for farms in the late 1800s. It comes back in very wet years, as in 1983, 1997 and 2023, flooding the fields that replaced it.","sources":["wp-tulare-lake"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS lake/reservoir point and Wikidata P625; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.05,"lon":-119.7881,"category":"lake","toleranceKm":50},{"id":"ca-monterey-bay","name":"Monterey Bay","tier":2,"explanation":"The bay between Santa Cruz and Monterey hides the Monterey Canyon, one of the largest submarine canyons in the world, which begins just off Moss Landing. Santa Cruz sits at its north end and Monterey at its south.","sources":["wp-monterey-bay"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS bay/cape/area point and Wikidata P625, point-in-water confirmed via Overpass where relevant; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.8,"lon":-121.9,"category":"water","toleranceKm":50},{"id":"ca-san-francisco-bay","name":"San Francisco Bay","tier":1,"explanation":"The estuary drains about 40 percent of California: Sierra snowmelt runs down the Sacramento and San Joaquin into Suisun and San Pablo bays and out through the Golden Gate. San Francisco, Oakland and San Jose all sit on its shore.","sources":["wp-san-francisco-bay"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS bay/cape/area point and Wikidata P625, point-in-water confirmed via Overpass where relevant; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.67,"lon":-122.27,"category":"water"},{"id":"ca-humboldt-bay","name":"Humboldt Bay","tier":3,"explanation":"The largest sheltered water between San Francisco Bay and Puget Sound and California's second-largest enclosed bay. Eureka sits on its shore and its oyster farms produce more than half of California's oysters.","sources":["wp-humboldt-bay","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"old point reverse-geocoded to the South Spit; moved to GNIS bay point; claims re-read"}],"kind":"place","map":"ca","lat":40.7498,"lon":-124.2095,"category":"water"},{"id":"ca-tomales-bay","name":"Tomales Bay","tier":3,"explanation":"A long, narrow inlet in Marin that is literally the San Andreas Fault: the bay fills a drowned section of the fault, which separates the Point Reyes peninsula from the mainland.","sources":["wp-tomales-bay"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS bay/cape/area point and Wikidata P625, point-in-water confirmed via Overpass where relevant; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.1486,"lon":-122.8979,"category":"water"},{"id":"ca-delta","name":"Sacramento–San Joaquin Delta","tier":3,"explanation":"Where California's two great rivers meet in a maze of channels and levee-ringed islands before entering Suisun Bay; Stockton sits at its eastern edge. It was named a National Heritage Area in 2019.","sources":["wp-delta"],"aliases":["California Delta"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS bay/cape/area point and Wikidata P625, point-in-water confirmed via Overpass where relevant; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.068,"lon":-121.8427,"category":"water","toleranceKm":50},{"id":"ca-big-sur","name":"Big Sur","tier":1,"explanation":"The stretch of coast where the Santa Lucia Mountains plunge straight into the Pacific, often called the longest undeveloped coastline in the lower 48. Highway 1 threads it across Bixby Creek Bridge.","sources":["wp-big-sur","usgs-gnis"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point snapped to GNIS Big Sur populated place; claims re-read"}],"kind":"place","map":"ca","lat":36.2702,"lon":-121.8075,"category":"water","toleranceKm":60,"hint":"Point = Big Sur village on Highway 1"},{"id":"ca-point-conception","name":"Point Conception","tier":3,"explanation":"The headland where California's coast turns from north–south to east–west, dividing Central from Southern California; weather forecasts use it as the boundary. The Chumash know it as the Western Gate for departing souls.","sources":["wp-point-conception"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs USGS GNIS bay/cape/area point and Wikidata P625, point-in-water confirmed via Overpass where relevant; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":34.4481,"lon":-120.4714,"category":"water"},{"id":"ca-central-valley","name":"Central Valley","tier":1,"explanation":"A flat 450-mile trough between the Coast Ranges and the Sierra, covering about 11 percent of the state; its farms supply a large share of the output of California, which grows more than half of the fruits, vegetables and nuts in the US.","sources":["wp-central-valley"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"centre point reverse-geocoded to Madera County; farm-output wording corrected to match the cited article"}],"kind":"place","map":"ca","lat":37,"lon":-120.3,"category":"region","toleranceKm":120,"hint":"Approximate center"},{"id":"ca-sacramento-valley","name":"Sacramento Valley","tier":2,"explanation":"The northern half of the Central Valley, drained by the Sacramento River and home to the capital. Wetter than the San Joaquin side, it grows water-hungry rice and walnuts.","sources":["wp-sacramento-valley"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"approximate-centre point reverse-geocoded (Nominatim/Overpass) to confirm it lies inside the region; vs GNIS/Wikidata where a point exists; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":39,"lon":-121.5,"category":"region","toleranceKm":90,"hint":"Approximate center"},{"id":"ca-san-joaquin-valley","name":"San Joaquin Valley","tier":2,"explanation":"The southern half of the Central Valley, a breadbasket of fruit, nuts and vegetables that also became a major oilfield; Dust Bowl migrants settled here around Bakersfield and Fresno.","sources":["wp-san-joaquin-valley"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"approximate-centre point reverse-geocoded (Nominatim/Overpass) to confirm it lies inside the region; vs GNIS/Wikidata where a point exists; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.6289,"lon":-120.185,"category":"region","toleranceKm":100,"hint":"Approximate center"},{"id":"ca-napa-valley","name":"Napa Valley","tier":1,"explanation":"America's most famous wine region became its second federal appellation in 1981. Its 1976 Judgment of Paris victory over top French wines put California wine on the map.","sources":["wp-napa-valley-ava"],"aliases":["Wine Country"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"approximate-centre point reverse-geocoded (Nominatim/Overpass) to confirm it lies inside the region; vs GNIS/Wikidata where a point exists; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.4012,"lon":-122.3302,"category":"region"},{"id":"ca-owens-valley","name":"Owens Valley","tier":2,"explanation":"With 14,000-foot peaks on both sides and a floor near 4,000 feet, Owens Valley is the deepest in the United States. The Paiute called it the place of flowing water, before Los Angeles took the water.","sources":["wp-owens-valley"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"approximate-centre point reverse-geocoded (Nominatim/Overpass) to confirm it lies inside the region; vs GNIS/Wikidata where a point exists; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.8025,"lon":-118.1997,"category":"region","toleranceKm":70},{"id":"ca-imperial-valley","name":"Imperial Valley","tier":3,"explanation":"A desert made farmland by Colorado River water via the All-American Canal, almost all of it below sea level. It is the most productive winter agricultural region in the United States.","sources":["wp-imperial-valley","wp-el-centro","wp-colorado-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point vs GNIS El Centro (0.95 km); superlative corrected to \"winter agricultural region\" per cited Colorado River article"}],"kind":"place","map":"ca","lat":32.8,"lon":-115.5667,"category":"region","toleranceKm":60,"hint":"Point = El Centro, its main city"},{"id":"ca-coachella-valley","name":"Coachella Valley","tier":2,"explanation":"The Palm Springs valley runs 45 miles from San Gorgonio Pass to the Salton Sea in the Colorado Desert. Deglet Noor date palms imported from Algeria in 1903 started its date industry; the music festival came much later.","sources":["wp-coachella-valley"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"approximate-centre point reverse-geocoded (Nominatim/Overpass) to confirm it lies inside the region; vs GNIS/Wikidata where a point exists; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":33.7667,"lon":-116.3592,"category":"region","toleranceKm":50},{"id":"ca-mojave-desert","name":"Mojave Desert","tier":1,"explanation":"The smallest and driest of North America's four deserts, in the rain shadow of the Sierra and Transverse Ranges, named for the Mohave people. It holds Death Valley's Badwater Basin, the continent's lowest point.","sources":["wp-mojave-desert"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"approximate-centre point reverse-geocoded (Nominatim/Overpass) to confirm it lies inside the region; vs GNIS/Wikidata where a point exists; claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":35,"lon":-116,"category":"region","toleranceKm":120,"hint":"Approximate center"},{"id":"ca-lost-coast","name":"Lost Coast","tier":3,"explanation":"The King Range mountains proved too steep for Highway 1, which turns inland at Rockport and leaves this stretch of Humboldt and Mendocino coast as the most remote in California. 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At 8,379 feet in the hills east of the Sierra, the state park keeps it in a state of arrested decay.","sources":["wp-bodie"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.2122,"lon":-119.0122,"category":"heritage"},{"id":"ca-sutters-mill","name":"Sutter's Mill (Coloma)","tier":2,"explanation":"While building John Sutter's sawmill, James Marshall found flakes of gold in the South Fork American River on January 24, 1848, starting the Gold Rush. A replica stands in Marshall Gold Discovery State Historic Park.","sources":["wp-sutters-mill"],"aliases":["Coloma","Marshall Gold Discovery"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata (0.00 km); \"tailrace\" wording replaced with the cited article’s account"}],"kind":"place","map":"ca","lat":38.8035,"lon":-120.8924,"category":"heritage"},{"id":"ca-sutters-fort","name":"Sutter's Fort","tier":3,"explanation":"John Sutter's New Helvetia colony, begun in 1839, was the first non-Indigenous settlement in the Central Valley and the seed of Sacramento. It is remembered for its ties to the Donner Party, and it was here that James Marshall showed Sutter the gold from his mill in January 1848, starting the rush that ruined him.","sources":["wp-sutters-fort"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata (0.11 km); Donner survivors claim replaced with sourced Marshall/Sutter meeting"}],"kind":"place","map":"ca","lat":38.5725,"lon":-121.4712,"category":"heritage"},{"id":"ca-mission-san-juan-capistrano","name":"Mission San Juan Capistrano","tier":2,"explanation":"Founded November 1, 1776, the mission is famous for the cliff swallows whose return is celebrated each March 19, Saint Joseph’s Day. Its Great Stone Church, the only Alta California mission chapel not built of adobe, was leveled by an earthquake in 1812.","sources":["wp-mission-sjc"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata (0.07 km); unsupported \"seventh mission\" and 1915-article claims replaced with sourced facts"}],"kind":"place","map":"ca","lat":33.5028,"lon":-117.6628,"category":"heritage"},{"id":"ca-mission-carmel","name":"Mission Carmel","tier":3,"explanation":"Mission San Carlos Borromeo, moved from Monterey to the Carmel River in 1771, was the headquarters of all the Alta California missions until 1833. Junípero Serra ran the chain from here and is buried inside the church.","sources":["wp-mission-carmel"],"aliases":["Carmel Mission","Mission San Carlos Borromeo de Carmelo"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.5428,"lon":-121.9192,"category":"heritage"},{"id":"ca-manzanar","name":"Manzanar","tier":2,"explanation":"One of ten camps where more than 120,000 Japanese Americans were incarcerated in World War II, Manzanar held over 10,000 people in the Owens Valley from 1942 to 1945. It is the best-preserved of the camp sites and now a National Historic Site.","sources":["wp-manzanar"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":36.7283,"lon":-118.1544,"category":"heritage"},{"id":"ca-angel-island-immigration","name":"Angel Island Immigration Station","tier":3,"explanation":"The Ellis Island of the West processed roughly 100,000 Chinese and 85,000 Japanese immigrants between 1910 and 1940, but, enforcing the Chinese Exclusion laws, it detained arrivals for weeks and rejected about 18 percent of them, many times Ellis Island’s rate. Poems carved into the barracks walls survive.","sources":["wp-angel-island-immigration"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata (0.00 km); rejection claim made specific (18 percent) per cited article"}],"kind":"place","map":"ca","lat":37.8697,"lon":-122.426,"category":"heritage"},{"id":"ca-fort-ross","name":"Fort Ross","tier":3,"explanation":"The Russian-American Company's southernmost outpost, from 1812 to 1841, trading furs and farming. Russians, Alaska Natives and Native Californians lived side by side; the site is now a state historic park.","sources":["wp-fort-ross"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":38.5144,"lon":-123.2436,"category":"heritage"},{"id":"ca-donner-pass","name":"Donner Pass","tier":2,"explanation":"The 7,056-foot pass west of Truckee is named for the Donner Party, trapped by snow in 1846. The California Trail, the first transcontinental railroad, the Lincoln Highway and I-80 all cross the Sierra here.","sources":["wp-donner-pass"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":39.3144,"lon":-120.3269,"category":"heritage"},{"id":"ca-alcatraz","name":"Alcatraz","tier":1,"explanation":"The Rock, 1.25 miles off San Francisco, was a fort and military prison before serving as a federal penitentiary from 1934 to 1963; cold water and strong currents made escape nearly impossible. Native American activists occupied it for 19 months in 1969–71.","sources":["wp-alcatraz"],"aliases":["Alcatraz Island","The Rock"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.8267,"lon":-122.4228,"category":"heritage"},{"id":"ca-hollywood-sign","name":"Hollywood Sign","tier":1,"explanation":"Erected on Mount Lee in 1923 as a temporary ad for the Hollywoodland housing tract, the sign lost its LAND in 1949 and was rebuilt in steel in 1978. The letters are 45 feet tall.","sources":["wp-hollywood-sign"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":34.1341,"lon":-118.3216,"category":"heritage"},{"id":"ca-golden-gate-bridge","name":"Golden Gate Bridge","tier":1,"explanation":"Opened in May 1937 across the mile-wide Golden Gate strait, its 4,200-foot main span made it the longest and tallest suspension bridge in the world until 1964. Its International Orange was the architect's choice over the Navy's black-and-yellow stripes.","sources":["wp-golden-gate-bridge"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.8197,"lon":-122.4786,"category":"heritage"},{"id":"ca-hetch-hetchy","name":"Hetch Hetchy","tier":2,"explanation":"A glacial valley in Yosemite once compared to Yosemite Valley itself, drowned in 1923 by O'Shaughnessy Dam on the Tuolumne. Since 1934 it has sent water 167 miles to San Francisco; the fight over it helped launch the modern environmental movement.","sources":["wp-hetch-hetchy","wp-tuolumne-river"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"point confirmed inside Hetch Hetchy Reservoir / Yosemite NP via Overpass, hint added; environmental-movement claim sourced to the Tuolumne River article"}],"kind":"place","map":"ca","lat":37.9481,"lon":-119.7881,"category":"heritage","hint":"Point = O'Shaughnessy Dam at the reservoir's west end"},{"id":"ca-palomar-observatory","name":"Palomar Observatory","tier":3,"explanation":"Caltech's observatory in San Diego County houses the 200-inch Hale Telescope, the largest in the world from its first light in 1949 until 1975.","sources":["wp-palomar-observatory"],"aliases":["Mount Palomar"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":33.3564,"lon":-116.865,"category":"heritage"},{"id":"ca-lick-observatory","name":"Lick Observatory","tier":3,"explanation":"On Mount Hamilton above San Jose, Lick was the world's first permanently staffed mountaintop observatory; its 36-inch refractor was the largest on Earth at first light in 1888. James Lick, who paid for it, is buried under the telescope.","sources":["wp-lick-observatory"],"verification":[{"by":"author:ca-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source"},{"by":"verifier:ca-check","date":"2026-11-01","method":"coordinates vs Wikidata P625 and USGS GNIS where listed (<0.6 km); claims re-read in cited Wikipedia text"}],"kind":"place","map":"ca","lat":37.3411,"lon":-121.6431,"category":"heritage"}]},{"id":"sf-civics","title":"Civics: Who Represents SF","subtitle":"City Hall, Sacramento and Washington","description":"Who holds office in San Francisco and who speaks for the city in Sacramento and Washington, plus how the government is built: the charter, the eleven-district Board, term limits and ranked-choice voting. Every card is dated 2026-11-01, two days before the November 3, 2026 general election. Results of that election will change offices from January 2027: the District 8 and 10 supervisors, the Board President, the CA-11 congressional seat (new member seated January 3, 2027), Governor and Lieutenant Governor are all open, and other offices may change too.","order":100,"accent":"bay","sources":[{"id":"sfgov-mayor","title":"Office of the Mayor — Daniel Lurie, 46th Mayor","url":"https://www.sf.gov/departments--office-mayor","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-lurie-profile","title":"Mayor Daniel Lurie (profile)","url":"https://www.sf.gov/profile--daniel-lurie","publisher":"City and County of San Francisco","accessed":"2026-11-01","note":"Sworn in as 46th mayor on January 8; year corroborated by Board Res. 612-24 declaring the Nov 5, 2024 results."},{"id":"sfbos-res-612-24","title":"Board of Supervisors Resolution 612-24 declaring results of the November 5, 2024 election","url":"https://sfbos.archive.sf.gov/sites/default/files/r0612-24.pdf","publisher":"SF Board of Supervisors","accessed":"2026-11-01"},{"id":"sfgov-bos","title":"Board of Supervisors — members by district","url":"https://www.sf.gov/departments--board-supervisors","publisher":"City and County of San Francisco","accessed":"2026-11-01","note":"sfbos.org now redirects here. Lists all 11 supervisors and identifies Rafael Mandelman as President."},{"id":"sfgov-d1","title":"District 1 Supervisor Connie Chan","url":"https://www.sf.gov/profile--connie-chan","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d2","title":"District 2 Supervisor Stephen Sherrill","url":"https://www.sf.gov/profile--stephen-sherrill","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d2-appointment","title":"Mayor Breed Appoints Stephen Sherrill to Serve on San Francisco Board of Supervisors (Dec. 18, 2024)","url":"https://www.sf.gov/news--mayor-breed-appoints-stephen-sherrill-serve-san-francisco-board-supervisors","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d3","title":"District 3 Supervisor Danny Sauter","url":"https://www.sf.gov/profile--danny-sauter","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d4","title":"District 4 Supervisor Alan Wong","url":"https://www.sf.gov/alan-wong","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d4-appointment","title":"Mayor Lurie Appoints Alan Wong as District 4 Supervisor (Dec. 1, 2025)","url":"https://www.sf.gov/news-mayor-lurie-appoints-alan-wong-as-district-4-supervisor","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d5","title":"District 5 Supervisor Bilal Mahmood","url":"https://www.sf.gov/profile--bilal-mahmood","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d6","title":"District 6 Supervisor Matt Dorsey","url":"https://www.sf.gov/profile--matt-dorsey","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d7","title":"District 7 Supervisor Myrna Melgar","url":"https://www.sf.gov/profile--myrna-melgar","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d8","title":"District 8 Supervisor Rafael Mandelman","url":"https://www.sf.gov/profile--rafael-mandelman","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfbos-president-2025","title":"Supervisor Mandelman Re-elected Unanimously as Board President (press release, Jan. 8, 2025)","url":"https://sfbos.archive.sf.gov/sites/default/files/01.08.25_Press_Release_Supervisor_Mandelman_Relected_Unanimously_As_Board_President.pdf","publisher":"SF Board of Supervisors","accessed":"2026-11-01"},{"id":"sfgov-d9","title":"District 9 Supervisor Jackie Fielder","url":"https://www.sf.gov/profile--jackie-fielder","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d10","title":"District 10 Supervisor Shamann Walton","url":"https://www.sf.gov/profile--shamann-walton","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-d11","title":"District 11 Supervisor Chyanne Chen","url":"https://www.sf.gov/profile--chyanne-chen","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-city-attorney","title":"Office of the City Attorney — David Chiu","url":"https://www.sf.gov/cityattorney","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-chiu-sworn","title":"David Chiu Sworn In as San Francisco City Attorney (Nov. 1, 2021)","url":"https://www.sf.gov/news-david-chiu-sworn-in-as-san-francisco-city-attorney","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfda-about","title":"About the District Attorney — Brooke Jenkins","url":"https://sfdistrictattorney.org/about-us/","publisher":"SF District Attorney's Office","accessed":"2026-11-01"},{"id":"sfpd-defender","title":"San Francisco Public Defender — Mano Raju","url":"https://sfpublicdefender.org/","publisher":"SF Public Defender's Office","accessed":"2026-11-01","note":"Oath of elected office February 20, 2020."},{"id":"sfsheriff-miyamoto","title":"Sheriff Paul M. Miyamoto","url":"https://sfsheriff.com/organization-chart/paul-m-miyamoto","publisher":"SF Sheriff's Office","accessed":"2026-11-01","note":"Page says 'first Asian American sheriff elected in San Francisco's 175-year history'; assumed office January 8, 2020."},{"id":"sftreasurer","title":"Office of the Treasurer & Tax Collector — José Cisneros","url":"https://sftreasurer.org/","publisher":"SF Treasurer & Tax Collector","accessed":"2026-11-01"},{"id":"sfgov-assessor","title":"Assessor-Recorder Joaquín Torres (profile)","url":"https://www.sf.gov/profile--joaquin-torres","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-city-administrator","title":"City Administrator Carmen Chu (profile)","url":"https://www.sf.gov/profile--carmen-chu","publisher":"City and County of San Francisco","accessed":"2026-11-01","note":"Sworn in Feb. 2, 2021 for a five-year Charter term; reappointed by Mayor Lurie Dec. 16, 2025 and confirmed by the Board Jan. 13, 2026 (Motion M26-001)."},{"id":"sfgov-controller","title":"Controller Greg Wagner (profile)","url":"https://www.sf.gov/profile--greg-wagner","publisher":"City and County of San Francisco","accessed":"2026-11-01","note":"Sworn in February 2024 for a ten-year term."},{"id":"sfgov-police-chief","title":"Mayor Lurie Appoints Derrick Lew Police Chief (Dec. 4, 2025)","url":"https://www.sf.gov/news-mayor-lurie-appoints-derrick-lew-police-chief-marks-new-generation-of-leadership-for-police-department","publisher":"City and County of San Francisco","accessed":"2026-11-01","note":"Announced Dec. 4, 2025, effective Dec. 22, 2025; Paul Yep was interim chief and stays on as a senior advisor."},{"id":"sffd-crispen","title":"Chief of Department Dean Crispen","url":"https://sf-fire.org/people/dean-crispen","publisher":"SF Fire Department","accessed":"2026-11-01","note":"Sworn in as 27th Chief on January 21, 2025."},{"id":"sfusd-su","title":"Superintendent Dr. Maria Su","url":"https://www.sfusd.edu/about-sfusd/our-team/dr-maria-su","publisher":"San Francisco Unified School District","accessed":"2026-11-01"},{"id":"ca-assembly-members","title":"Assembly Members (80 seats)","url":"https://www.assembly.ca.gov/assemblymembers","publisher":"California State Assembly","accessed":"2026-11-01"},{"id":"ca-senate-senators","title":"Senators (40 seats)","url":"https://www.senate.ca.gov/senators","publisher":"California State Senate","accessed":"2026-11-01"},{"id":"sd11-bio","title":"Senator Scott Wiener — Biography","url":"https://sd11.senate.ca.gov/biography","publisher":"California State Senate","accessed":"2026-11-01"},{"id":"house-representatives","title":"Directory of Representatives","url":"https://www.house.gov/representatives","publisher":"U.S. House of Representatives","accessed":"2026-11-01"},{"id":"senate-ca","title":"Senators of the 119th Congress — California","url":"https://www.senate.gov/states/CA/senators.htm","publisher":"U.S. Senate","accessed":"2026-11-01"},{"id":"gov-ca-about","title":"About Governor Gavin Newsom","url":"https://www.gov.ca.gov/about/","publisher":"Office of the Governor of California","accessed":"2026-11-01","note":"Fetched successfully on 2026-11-01; names Newsom as 40th Governor, elected Nov 6, 2018."},{"id":"ltg-ca-about","title":"About Lieutenant Governor Eleni Kounalakis","url":"https://ltg.ca.gov/about/","publisher":"Office of the Lieutenant Governor of California","accessed":"2026-11-01","note":"Fetched successfully on 2026-11-01; sworn in as 50th Lieutenant Governor on January 7, 2019."},{"id":"sf-charter-2-100","title":"San Francisco Charter Sec. 2.100 — Composition of the Board of Supervisors","url":"https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_charter/0-0-0-27","publisher":"American Legal Publishing","accessed":"2026-11-01","note":"Live site returns 403 to automated fetch; text confirmed from the Wayback Machine capture of 2021-03-02 (section last amended November 2002)."},{"id":"sf-charter-2-101","title":"San Francisco Charter Sec. 2.101 — Term of Office (Supervisors)","url":"https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_charter/0-0-0-35","publisher":"American Legal Publishing","accessed":"2026-11-01","note":"Text confirmed from Wayback Machine capture of 2024-09-01."},{"id":"sf-charter-2-116","title":"San Francisco Charter Sec. 2.116 — President of the Board","url":"https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_charter/0-0-0-95","publisher":"American Legal Publishing","accessed":"2026-11-01","note":"Text confirmed from Wayback Machine capture of 2021-03-04 (section last amended November 1996)."},{"id":"sf-charter-3-101","title":"San Francisco Charter Sec. 3.101 — Term of Office (Mayor)","url":"https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_charter/0-0-0-130","publisher":"American Legal Publishing","accessed":"2026-11-01","note":"Text confirmed from Wayback Machine capture of 2026-04-15 (pre-Prop B wording)."},{"id":"sf-charter-13-101","title":"San Francisco Charter Sec. 13.101 — Terms of Elective Office","url":"https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_charter/0-0-0-1165","publisher":"American Legal Publishing","accessed":"2026-11-01","note":"Text confirmed from Wayback Machine capture of 2024-12-16 (as amended by Prop H, Nov 2022)."},{"id":"sf-charter-13-102","title":"San Francisco Charter Sec. 13.102 — Instant Runoff Elections (added March 2002)","url":"https://codelibrary.amlegal.com/codes/san_francisco/latest/sf_charter/0-0-0-1181","publisher":"American Legal Publishing","accessed":"2026-11-01","note":"Text confirmed from Wayback Machine capture of 2025-04-21."},{"id":"sfgov-rcv","title":"Ranked-choice voting","url":"https://sf.gov/ranked-choice-voting","publisher":"SF Department of Elections","accessed":"2026-11-01","note":"'San Francisco voters have used this method to fill most local offices since November 2004.'"},{"id":"sfbos-res-392-26","title":"Board of Supervisors Resolution 392-26 declaring results of the June 2, 2026 election (Prop B: Lifetime Term Limits for Mayor and Members of the Board of Supervisors — passed)","url":"https://media.api.sf.gov/documents/r0392-26.pdf","publisher":"SF Board of Supervisors","accessed":"2026-11-01"},{"id":"census-apportionment-2020","title":"2020 Census Apportionment Results, Table 1 (California: 52 seats)","url":"https://www2.census.gov/programs-surveys/decennial/2020/data/apportionment/apportionment-2020-table01.pdf","publisher":"U.S. Census Bureau","accessed":"2026-11-01"},{"id":"ca-sos-redistricting","title":"California Redistricting (Proposition 50 congressional maps used 2026–2030)","url":"https://www.sos.ca.gov/elections/california-redistricting","publisher":"California Secretary of State","accessed":"2026-11-01"},{"id":"ca-senate-cd15-2025","title":"Congressional District 15 (2025 map) — population by county","url":"https://sdmg.senate.ca.gov/committeehome/2025-congressional-districts/congressional-district-15-2025","publisher":"California Senate Office of Demographics","accessed":"2026-11-01","note":"CD-15 includes 114,928 San Francisco residents; CD-11 includes 760,068."},{"id":"sfgov-candidates-nov-2026","title":"Candidates — November 3, 2026 General Election","url":"https://www.sf.gov/candidates-november-3-2026-general-election","publisher":"SF Department of Elections","accessed":"2026-11-01"},{"id":"wp-government-sf","title":"Government of San Francisco","url":"https://en.wikipedia.org/wiki/Government_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"sfbos-m26-001","title":"Board of Supervisors Motion M26-001 confirming the mayoral reappointment of Carmen Chu as City Administrator (approved Jan. 13, 2026)","url":"https://www.sfbos.org/sites/default/files/m26-0001.pdf","publisher":"SF Board of Supervisors","accessed":"2026-11-01"},{"id":"sfusd-su-permanent","title":"SF Board of Education Approves Two-Year Contract Extension for Superintendent Dr. Maria Su Through June 2028 (Nov. 19, 2025)","url":"https://www.sfusd.edu/about-sfusd/sfusd-news/press-releases/2025-11-19-sf-board-education-approves-two-year-contract-extension-superintendent-dr-maria-su-through-june-2028","publisher":"San Francisco Unified School District","accessed":"2026-11-01"},{"id":"sfcityatty-succession-2017","title":"City Attorney memorandum: Mayoral Succession (Dec. 12, 2017) — Board President becomes Acting Mayor under Charter Sec. 13.101.5(b)","url":"https://media.api.sf.gov/documents/Mayoral-Succession.pdf","publisher":"SF City Attorney","accessed":"2026-11-01"},{"id":"fairvote-sf-irv-2002","title":"Instant Runoff Voting Charter Amendment for San Francisco (Proposition A, March 5, 2002)","url":"https://archive.fairvote.org/sfrcv/irvleg.htm","publisher":"FairVote (archive)","accessed":"2026-11-01"},{"id":"sfgov-chu-reappointed","title":"Mayor Lurie Reappoints Carmen Chu as City Administrator (Dec. 17, 2025)","url":"https://www.sf.gov/news-mayor-lurie-reappoints-carmen-chu-as-city-administrator","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"sfgov-crispen-named","title":"Mayor Daniel Lurie Names Battalion Chief Dean Crispen New Fire Chief (Jan. 10, 2025)","url":"https://www.sf.gov/news--mayor-daniel-lurie-names-battalion-chief-dean-crispen-new-fire-chief","publisher":"City and County of San Francisco","accessed":"2026-11-01"}],"items":[{"id":"civ-mayor","name":"Daniel Lurie","tier":1,"explanation":"Lurie, founder of the nonprofit Tipping Point, defeated incumbent London Breed in November 2024 and was sworn in as the 46th mayor on January 8, 2025. The next mayoral election is in November 2028.","sources":["sfgov-mayor","sfgov-lurie-profile","sfbos-res-612-24"],"tags":["mayor"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov Office of the Mayor and Lurie profile (news dated to Nov 1, 2026) name Lurie 46th Mayor, sworn in Jan 8; BOS Res. 612-24 (Nov 5, 2024 results) read via pdftotext; Jan 8, 2025 inauguration confirmed by KQED/Bay City News coverage; next mayoral election 2028 per Charter 13.101(b)(1)."}],"kind":"fact","question":"Who is the current Mayor of San Francisco?","distractors":["London Breed","Mark Farrell","Aaron Peskin"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d1","name":"Connie Chan","tier":2,"explanation":"Chan, a former legislative aide, has represented the Richmond since 2021 and was re-elected in 2024. She is a candidate for the open CA-11 congressional seat on November 3, 2026; a win would create a District 1 vacancy filled by mayoral appointment.","sources":["sfgov-d1","sfgov-bos","sfgov-candidates-nov-2026"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster (calendar dated Nov 2, 2026) lists Chan for D1; sf.gov D1 profile neighborhood list checked; Res. 612-24 declares her elected Nov 2024; sf.gov Nov 3, 2026 candidate list shows Chan vs Wiener for US Rep. District 11; legislative-aide background per sf.gov profile/ClimateOne."}],"kind":"fact","question":"Who is the Supervisor for District 1 (the Richmond, Lone Mountain, Sea Cliff, Golden Gate Park)?","distractors":["Sandra Lee Fewer","Eric Mar","Myrna Melgar"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d2","name":"Stephen Sherrill","tier":3,"explanation":"Mayor Breed appointed Sherrill in December 2024 to fill Catherine Stefani's seat after she won an Assembly race; he won the June 2026 special election for the rest of the term and is on the November 3, 2026 ballot for a full term.","sources":["sfgov-d2","sfgov-bos","sfgov-d2-appointment","sfgov-candidates-nov-2026"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D2 profile (neighborhoods checked); sf.gov Dec 18, 2024 appointment release; Res. 392-26 (June 2, 2026 results, adopted June 30, 2026) declares Sherrill elected D2; sf.gov Nov 3, 2026 candidate list includes Sherrill."}],"kind":"fact","question":"Who is the Supervisor for District 2 (Marina, Pacific Heights, Cow Hollow, Presidio, Polk Gulch)?","distractors":["Catherine Stefani","Mark Farrell","Danny Sauter"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d3","name":"Danny Sauter","tier":3,"explanation":"Sauter, a former neighborhood nonprofit director, won the 2024 race to succeed termed-out Aaron Peskin in the city's densest northeastern district.","sources":["sfgov-d3","sfgov-bos"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D3 profile (neighborhoods checked); Res. 612-24 declares Sauter elected D3 in Nov 2024."}],"kind":"fact","question":"Who is the Supervisor for District 3 (North Beach, Chinatown, Nob Hill, Russian Hill, Financial District, Fisherman's Wharf)?","distractors":["Aaron Peskin","Bilal Mahmood","David Chiu"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d4","name":"Alan Wong","tier":3,"explanation":"Mayor Lurie appointed Wong, a City College trustee, on December 1, 2025 after voters recalled Joel Engardio; he won the June 2026 special election and faces voters again on November 3, 2026.","sources":["sfgov-d4","sfgov-bos","sfgov-d4-appointment","sfgov-candidates-nov-2026"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D4 page (neighborhoods checked); sf.gov Dec 1, 2025 appointment release; Engardio recall Sept 16, 2025 certified Sept 25 (Mission Local/KALW); Res. 392-26 declares Wong elected D4 June 2, 2026; sf.gov Nov 3, 2026 candidate list includes Wong."}],"kind":"fact","question":"Who is the Supervisor for District 4 (the Sunset, Parkside, Lakeshore)?","distractors":["Joel Engardio","Gordon Mar","Katy Tang"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d5","name":"Bilal Mahmood","tier":3,"explanation":"Mahmood, a former Obama administration staffer and entrepreneur, unseated Dean Preston in November 2024 in the district that stretches from the Tenderloin to the Haight.","sources":["sfgov-d5","sfgov-bos"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D5 profile (neighborhoods checked); Res. 612-24 declares Mahmood elected D5 in Nov 2024."}],"kind":"fact","question":"Who is the Supervisor for District 5 (Tenderloin, Hayes Valley, Western Addition, Japantown, Haight-Ashbury)?","distractors":["Dean Preston","London Breed","Danny Sauter"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d6","name":"Matt Dorsey","tier":3,"explanation":"Dorsey, a former SFPD and City Attorney communications director, was appointed in 2022, elected that November, and is on the November 3, 2026 ballot.","sources":["sfgov-d6","sfgov-bos","sfgov-candidates-nov-2026"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D6 profile (neighborhoods checked); sf.gov Nov 3, 2026 candidate list shows Dorsey vs Behrend for D6."}],"kind":"fact","question":"Who is the Supervisor for District 6 (SoMa, Mission Bay, Civic Center, South Beach, Treasure Island)?","distractors":["Matt Haney","Jane Kim","Chris Daly"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d7","name":"Myrna Melgar","tier":3,"explanation":"Melgar, a former Planning Commission president, has held the west-side seat since 2021 and was re-elected in 2024.","sources":["sfgov-d7","sfgov-bos"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D7 profile (neighborhoods checked); Res. 612-24 declares Melgar elected D7 in Nov 2024."}],"kind":"fact","question":"Who is the Supervisor for District 7 (West Portal, Inner Sunset, Forest Hill, Parkmerced, St. Francis Wood)?","distractors":["Norman Yee","Connie Chan","Sean Elsbernd"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d8","name":"Rafael Mandelman","tier":2,"explanation":"Mandelman has represented the Castro since 2018 and is President of the Board. He is termed out, so District 8 elects a new supervisor on November 3, 2026, and the Board will choose a new president on January 8, 2027.","sources":["sfgov-d8","sfgov-bos","sfbos-president-2025","sfgov-candidates-nov-2026"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster (identifies Mandelman as President) and D8 profile (neighborhoods checked); Jan 8, 2025 BOS press release read via pdftotext; Mandelman absent from sf.gov Nov 3, 2026 D8 candidate list (four candidates); Charter 2.116 (Wayback capture) sets presidency election Jan 8 of odd years."}],"kind":"fact","question":"Who is the Supervisor for District 8 (the Castro, Noe Valley, Glen Park, Diamond Heights, Cole Valley)?","distractors":["Scott Wiener","Bevan Dufty","Jackie Fielder"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d9","name":"Jackie Fielder","tier":3,"explanation":"Fielder, a democratic socialist who ran for State Senate in 2020, won the open seat in November 2024 after Hillary Ronen termed out.","sources":["sfgov-d9","sfgov-bos"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D9 profile (neighborhoods checked); Res. 612-24 declares Fielder elected D9 in Nov 2024."}],"kind":"fact","question":"Who is the Supervisor for District 9 (the Mission, Bernal Heights, Portola)?","distractors":["Hillary Ronen","David Campos","Chyanne Chen"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d10","name":"Shamann Walton","tier":3,"explanation":"Walton, a former school board president and Board President in 2021–22, has held the southeastern seat since 2019. He is termed out; ten candidates are running for District 10 on November 3, 2026.","sources":["sfgov-d10","sfgov-bos","sfgov-candidates-nov-2026"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D10 profile (neighborhoods checked); sf.gov Nov 3, 2026 candidate list shows ten D10 candidates without Walton; Walton's 2021-23 presidency per BOS Jan 8, 2021 press release."}],"kind":"fact","question":"Who is the Supervisor for District 10 (Bayview–Hunters Point, Potrero Hill, Dogpatch, Visitacion Valley)?","distractors":["Malia Cohen","Sophie Maxwell","Chyanne Chen"],"asOf":"2026-11-01"},{"id":"civ-supervisor-d11","name":"Chyanne Chen","tier":3,"explanation":"Chen, a labor organizer, won the 2024 race to succeed termed-out Ahsha Safaí in the city's southernmost residential district.","sources":["sfgov-d11","sfgov-bos"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster and D11 profile (neighborhoods checked); Res. 612-24 declares Chen elected D11 in Nov 2024."}],"kind":"fact","question":"Who is the Supervisor for District 11 (Excelsior, Outer Mission, Crocker-Amazon, Mission Terrace)?","distractors":["Ahsha Safaí","John Avalos","Jackie Fielder"],"asOf":"2026-11-01"},{"id":"civ-board-president","name":"Rafael Mandelman","tier":2,"explanation":"The District 8 supervisor was elected president unanimously on January 8, 2025. Because he is termed out of his seat, the new Board elects a different president on January 8, 2027.","sources":["sfgov-bos","sfbos-president-2025"],"tags":["board-of-supervisors"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov BOS roster (page dated Nov 2026) identifies Mandelman as President; Jan 8, 2025 BOS press release (pdftotext) confirms unanimous election; Charter 2.116 (Wayback capture) sets two-year term elected Jan 8 of odd years."}],"kind":"fact","question":"Who is the current President of the San Francisco Board of Supervisors?","distractors":["Aaron Peskin","Shamann Walton","Connie Chan"],"asOf":"2026-11-01"},{"id":"civ-city-attorney","name":"David Chiu","tier":2,"explanation":"Chiu, a former Board president and Assembly member, was appointed by Mayor Breed and sworn in on November 1, 2021 after Dennis Herrera left to run the Public Utilities Commission; he was elected to a full term in November 2024.","sources":["sfgov-city-attorney","sfgov-chiu-sworn","sfbos-res-612-24"],"tags":["citywide-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov City Attorney page (press releases through Oct 29, 2026) names David Chiu; sf.gov Nov 1, 2021 swearing-in release; Res. 612-24 declares Chiu elected City Attorney Nov 2024."}],"kind":"fact","question":"Who is San Francisco's City Attorney?","distractors":["Dennis Herrera","Louise Renne","Brooke Jenkins"],"asOf":"2026-11-01"},{"id":"civ-district-attorney","name":"Brooke Jenkins","tier":1,"explanation":"Mayor Breed appointed Jenkins in July 2022 after voters recalled Chesa Boudin; she won election that November and re-election in November 2024, with a term running to January 2029.","sources":["sfda-about","sfbos-res-612-24"],"tags":["citywide-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sfdistrictattorney.org About page: appointed July 8, 2022, elected Nov 2022, re-elected Nov 5, 2024; Res. 612-24 confirms; term to Jan 2029 per Charter 13.101."}],"kind":"fact","question":"Who is San Francisco's District Attorney?","distractors":["Chesa Boudin","George Gascón","Kamala Harris"],"asOf":"2026-11-01"},{"id":"civ-public-defender","name":"Mano Raju","tier":3,"explanation":"Raju was appointed after Jeff Adachi's death in 2019 and took the oath of elected office on February 20, 2020. He is the sole qualified candidate for the office on the November 3, 2026 ballot.","sources":["sfpd-defender","sfgov-candidates-nov-2026"],"tags":["citywide-officials"],"aliases":["Manohar Raju"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sfpublicdefender.org (news through Oct 8, 2026) names Manohar Raju, oath of elected office Feb 20, 2020; sf.gov Nov 3, 2026 candidate list shows Raju as sole Public Defender candidate."}],"kind":"fact","question":"Who is San Francisco's elected Public Defender?","distractors":["Jeff Adachi","Matt Gonzalez","David Chiu"],"asOf":"2026-11-01"},{"id":"civ-sheriff","name":"Paul Miyamoto","tier":3,"explanation":"Miyamoto took office on January 8, 2020 as the first Asian American elected sheriff in San Francisco's history and was re-elected in November 2024. The Sheriff runs the county jails and court security; SFPD handles street policing.","sources":["sfsheriff-miyamoto","sfbos-res-612-24"],"tags":["citywide-officials"],"aliases":["Paul M. Miyamoto"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sfsheriff.com Miyamoto page (assumed office Jan 8, 2020; 'first Asian American sheriff elected in San Francisco'); Res. 612-24 declares him elected Sheriff Nov 2024. Corrected the 'first in California' claim (Trinity County's Timothy Saxon preceded him)."}],"kind":"fact","question":"Who is the Sheriff of San Francisco?","distractors":["Vicki Hennessy","Ross Mirkarimi","Michael Hennessey"],"asOf":"2026-11-01"},{"id":"civ-treasurer","name":"José Cisneros","tier":3,"explanation":"Cisneros was appointed by Mayor Newsom in 2004, first elected in 2005, and has been re-elected ever since, most recently in November 2024.","sources":["sftreasurer","sfbos-res-612-24"],"tags":["citywide-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sftreasurer.org names Cisneros, appointed 2004 and first elected 2005; Res. 612-24 declares him elected Treasurer Nov 2024."}],"kind":"fact","question":"Who is San Francisco's Treasurer & Tax Collector?","distractors":["Carmen Chu","Joaquín Torres","Phil Ting"],"asOf":"2026-11-01"},{"id":"civ-assessor-recorder","name":"Joaquín Torres","tier":3,"explanation":"Torres, formerly head of the Office of Economic and Workforce Development, was appointed in 2021 and elected to a full term in 2022. He is unopposed on the November 3, 2026 ballot.","sources":["sfgov-assessor","sfgov-candidates-nov-2026"],"tags":["citywide-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov Torres profile (elected to full term 2022; formerly OEWD director); sf.gov Jan 5, 2023 inauguration release (appointed Feb 2021 by Breed); sf.gov Nov 3, 2026 candidate list shows Torres as sole Assessor-Recorder candidate."}],"kind":"fact","question":"Who is San Francisco's Assessor-Recorder?","distractors":["Carmen Chu","Phil Ting","José Cisneros"],"asOf":"2026-11-01"},{"id":"civ-city-administrator","name":"Carmen Chu","tier":3,"explanation":"Chu, a former supervisor and Assessor-Recorder, was sworn in on February 2, 2021 and was reappointed by Mayor Lurie to a second five-year term, confirmed by the Board on January 13, 2026. The City Administrator oversees internal services like real estate, purchasing and the Medical Examiner; a November 2026 measure (Prop E) would lengthen the post's term from five to ten years.","sources":["sfgov-city-administrator","sfgov-chu-reappointed","sfbos-m26-001"],"tags":["appointed-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov Chu profile (sworn in Feb 2, 2021); sf.gov Dec 17, 2025 reappointment release; BOS Motion M26-001 approved Jan 13, 2026 (pdftotext); sf.gov qualified-ballot-measures lists Prop E 'City Administrator's Authority and Changes to City Contracting' and its legal text changes the term from five to ten years."}],"kind":"fact","question":"Who is San Francisco's City Administrator?","distractors":["Naomi Kelly","Greg Wagner","Ed Lee"],"asOf":"2026-11-01"},{"id":"civ-controller","name":"Greg Wagner","tier":4,"explanation":"Wagner was sworn in in February 2024 for a ten-year term, succeeding Ben Rosenfield. The Controller certifies the budget, audits departments and writes the impartial cost analyses in the voter pamphlet.","sources":["sfgov-controller"],"tags":["appointed-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov Wagner profile: Controller, sworn in Feb 2024 for a 10-year term, succeeding Ben Rosenfield."}],"kind":"fact","question":"Who is San Francisco's Controller, the city's chief financial officer?","distractors":["Ben Rosenfield","Carmen Chu","Ed Harrington"],"asOf":"2026-11-01"},{"id":"civ-police-chief","name":"Derrick Lew","tier":3,"explanation":"Mayor Lurie named Lew, a longtime SFPD commander, chief in December 2025 (effective December 22) after Bill Scott departed and Paul Yep served as interim chief.","sources":["sfgov-police-chief"],"tags":["appointed-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov Dec 4, 2025 release: Lurie appoints Derrick Lew chief effective Dec 22; Paul Yep was interim chief."}],"kind":"fact","question":"Who is the Chief of the San Francisco Police Department?","distractors":["Bill Scott","Paul Yep","Greg Suhr"],"asOf":"2026-11-01"},{"id":"civ-fire-chief","name":"Dean Crispen","tier":4,"explanation":"Crispen, a 34-year SFFD veteran, was Mayor Lurie's first major appointment and was sworn in as the department's 27th chief on January 21, 2025, replacing interim chief Sandra Tong, who had filled in after Jeanine Nicholson retired in 2024.","sources":["sffd-crispen","sfgov-crispen-named"],"tags":["appointed-officials"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf-fire.org Crispen page (27th Chief, sworn in Jan 21, 2025); sf.gov Jan 10, 2025 appointment release and KQED/Mission Local coverage (replaced interim chief Sandra Tong; Nicholson retired 2024). Corrected predecessor."}],"kind":"fact","question":"Who is the Chief of the San Francisco Fire Department?","distractors":["Jeanine Nicholson","Joanne Hayes-White","Derrick Lew"],"asOf":"2026-11-01"},{"id":"civ-sfusd-superintendent","name":"Maria Su","tier":3,"explanation":"Su, previously head of the city's Department of Children, Youth and Their Families, took over SFUSD on an interim basis in October 2024 after Matt Wayne's exit; the Board of Education made her the permanent superintendent in November 2025 with a contract through June 2028.","sources":["sfusd-su","sfusd-su-permanent"],"tags":["appointed-officials"],"aliases":["Dr. Maria Su"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sfusd.edu Su profile (Superintendent; former DCYF director); SFUSD Nov 19, 2025 press release: appointed Oct 2024, unanimously made permanent with contract through June 2028."}],"kind":"fact","question":"Who is the Superintendent of the San Francisco Unified School District?","distractors":["Matt Wayne","Vincent Matthews","Richard Carranza"],"asOf":"2026-11-01"},{"id":"civ-assembly-17","name":"Matt Haney","tier":3,"explanation":"Haney, a former District 6 supervisor, won the seat in 2022 and is seeking re-election on November 3, 2026.","sources":["ca-assembly-members"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"assembly.ca.gov member list (2026) shows Matt Haney, AD 17; sf.gov Nov 3, 2026 candidate list shows Haney vs Noris-Barrera."}],"kind":"fact","question":"Who represents Assembly District 17 (eastern San Francisco) in the California State Assembly?","distractors":["David Chiu","Phil Ting","Scott Wiener"],"asOf":"2026-11-01"},{"id":"civ-assembly-19","name":"Catherine Stefani","tier":3,"explanation":"Stefani, the former District 2 supervisor, succeeded Phil Ting in December 2024 and is on the November 3, 2026 ballot.","sources":["ca-assembly-members"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"assembly.ca.gov member list (2026) shows Catherine Stefani, AD 19; a19.asmdc.org Dec 2, 2024 swearing-in release; sf.gov Nov 3, 2026 candidate list shows Stefani vs Wing."}],"kind":"fact","question":"Who represents Assembly District 19 (western San Francisco and northern San Mateo County) in the State Assembly?","distractors":["Phil Ting","Matt Haney","Myrna Melgar"],"asOf":"2026-11-01"},{"id":"civ-senate-11","name":"Scott Wiener","tier":2,"explanation":"Wiener, first elected in 2016, is known for housing and transit legislation. He is running for Nancy Pelosi's congressional seat on November 3, 2026; a win would trigger a 2027 special election for SD-11.","sources":["ca-senate-senators","sd11-bio"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"senate.ca.gov senators list (2026) shows Scott Wiener, SD 11; sf.gov Nov 3, 2026 candidate list shows Wiener vs Chan for US Rep. District 11."}],"kind":"fact","question":"Who represents San Francisco (Senate District 11) in the California State Senate?","distractors":["Mark Leno","Matt Haney","Catherine Stefani"],"asOf":"2026-11-01"},{"id":"civ-house-ca11","name":"Nancy Pelosi","tier":1,"explanation":"Pelosi has represented the city since 1987 and was the first woman Speaker. She is not running in 2026; Connie Chan and Scott Wiener face off for the seat on November 3, 2026, and the winner takes office January 3, 2027.","sources":["house-representatives","sfgov-candidates-nov-2026"],"tags":["federal"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"house.gov directory lists Pelosi for CA-11; Nov 2025 retirement announcement coverage; sf.gov Nov 3, 2026 candidate list shows Chan and Wiener; sos.ca.gov redistricting page: new districts take effect Jan 3, 2027."}],"kind":"fact","question":"Who represents most of San Francisco (CA-11) in the US House of Representatives?","distractors":["Jackie Speier","Scott Wiener","Connie Chan"],"asOf":"2026-11-01"},{"id":"civ-house-ca15","name":"Kevin Mullin","tier":4,"explanation":"Mullin, a former Assembly speaker pro tem, succeeded Jackie Speier in 2023. Under the Prop 50 map used for 2026, CD-15 still takes in about 115,000 San Francisco residents.","sources":["house-representatives","ca-senate-cd15-2025","ca-sos-redistricting"],"tags":["federal"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"house.gov directory lists Mullin for CA-15; sf.gov Nov 3, 2026 candidate list shows Mullin vs Hoelter; CA Senate Office of Demographics 2025 CD-15 page: 114,928 SF residents; sos.ca.gov: Prop 50 maps used 2026-2030."}],"kind":"fact","question":"Which member of Congress represents the slice of southern San Francisco in CA-15, along with most of San Mateo County?","distractors":["Jackie Speier","Anna Eshoo","Eric Swalwell"],"asOf":"2026-11-01"},{"id":"civ-us-senators","name":"Alex Padilla and Adam Schiff","tier":1,"explanation":"Padilla was appointed in January 2021 to Kamala Harris's seat and elected in 2022; Schiff won Dianne Feinstein's former seat in November 2024 and took office that December. Neither seat is on the 2026 ballot.","sources":["senate-ca"],"tags":["federal"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"senate.gov California page: Padilla (term began Jan 18, 2021) and Schiff (term began Dec 8, 2024, elected to term ending Jan 3, 2031)."}],"kind":"fact","question":"Who are California's two US Senators?","distractors":["Dianne Feinstein and Barbara Boxer","Kamala Harris and Alex Padilla","Laphonza Butler and Adam Schiff"],"asOf":"2026-11-01"},{"id":"civ-governor","name":"Gavin Newsom","tier":1,"explanation":"The former San Francisco mayor has been governor since January 2019 and is termed out. Voters choose his successor on November 3, 2026; the new governor takes office in January 2027.","sources":["gov-ca-about"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"gov.ca.gov About page names Newsom 40th Governor, elected Nov 6, 2018; sworn in Jan 7, 2019 (AP via ABC7); two-term limit; successor chosen Nov 3, 2026."}],"kind":"fact","question":"Who is the Governor of California?","distractors":["Jerry Brown","Xavier Becerra","Eleni Kounalakis"],"asOf":"2026-11-01"},{"id":"civ-lt-governor","name":"Eleni Kounalakis","tier":3,"explanation":"Kounalakis, a former US ambassador to Hungary, has held the office since January 2019 and is termed out; she is running for State Treasurer in 2026.","sources":["ltg-ca-about"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"ltg.ca.gov About page: Kounalakis sworn in Jan 7, 2019 as 50th Lt. Governor, former Ambassador to Hungary; CalMatters/SD County candidate list confirm she is on the Nov 3, 2026 State Treasurer ballot."}],"kind":"fact","question":"Who is California's Lieutenant Governor?","distractors":["Gavin Newsom","Fiona Ma","Alex Padilla"],"asOf":"2026-11-01"},{"id":"civ-number-of-supervisors","name":"11","tier":1,"explanation":"Charter Section 2.100 sets eleven members elected by district. District elections returned in 2000; odd-numbered districts vote in presidential years and even-numbered districts in midterm years.","sources":["sf-charter-2-100","sfgov-bos"],"tags":["structure"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Charter Sec. 2.100 (Wayback capture of amlegal) 'eleven members elected by district'; sf.gov BOS roster lists 11; Charter 13.101 and sf.gov candidate list confirm even districts vote in 2026."}],"kind":"fact","question":"How many members sit on the San Francisco Board of Supervisors?","distractors":["7","9","15"],"asOf":"2026-11-01"},{"id":"civ-board-president-selection","name":"The supervisors elect one of their own by majority vote","tier":2,"explanation":"Under Charter Section 2.116 the Board elects its president for a two-year term at its January 8 meeting in odd-numbered years. The president assigns committee seats and becomes acting mayor if the mayor's office is vacant.","sources":["sf-charter-2-116","sfcityatty-succession-2017"],"tags":["structure"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Charter Sec. 2.116 (Wayback capture): Board elects President by majority vote on Jan 8 of odd-numbered years for a two-year term; City Attorney Dec 12, 2017 memo: Board President becomes Acting Mayor under Sec. 13.101.5(b)."}],"kind":"fact","question":"How is the President of the Board of Supervisors chosen?","distractors":["Voters elect the president citywide","The mayor appoints the president","The longest-serving supervisor serves automatically"],"asOf":"2026-11-01"},{"id":"civ-term-length","name":"Four years","tier":1,"explanation":"Both serve four-year terms beginning January 8 (Charter Secs. 2.101 and 3.101). The Charter long limited them to two successive terms; in June 2026 voters passed Prop B making that a lifetime limit of two terms per office.","sources":["sf-charter-2-101","sf-charter-3-101","sfbos-res-392-26"],"tags":["structure"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Charter Secs. 2.101 and 3.101 (Wayback captures) set four-year terms; 13.101(a) sets Jan 8 start; Res. 392-26 (pdftotext) declares Prop B 'Lifetime Term Limits for Mayor and Members of the Board of Supervisors' adopted June 2, 2026."}],"kind":"fact","question":"How long is a term for the Mayor and for a Supervisor?","distractors":["Two years","Three years","Six years"],"asOf":"2026-11-01"},{"id":"civ-term-limit","name":"Two terms","tier":2,"explanation":"Historically the cap was two successive four-year terms (Charter Secs. 2.101 and 3.101), so a former mayor or supervisor could run again after sitting out. Prop B, approved June 2, 2026, converted this to a lifetime cap of two terms per office whether or not they are consecutive.","sources":["sf-charter-2-101","sf-charter-3-101","sfbos-res-392-26"],"tags":["structure"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Charter Secs. 2.101 and 3.101 (Wayback captures) set two successive terms; Res. 392-26 declares Prop B adopted June 2, 2026; GrowSF/KALW describe it as a lifetime two-term cap."}],"kind":"fact","question":"How many terms may a San Francisco mayor or supervisor serve?","distractors":["One term","Three terms","No limit"],"asOf":"2026-11-01"},{"id":"civ-assembly-size","name":"80","tier":2,"explanation":"The Assembly has 80 members serving two-year terms; San Francisco is split between Districts 17 and 19. The Senate has 40 members serving four-year terms.","sources":["ca-assembly-members","ca-senate-senators"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"assembly.ca.gov lists 80 members (incl. one vacancy); senate.ca.gov lists 40 seats; Haney AD 17 and Stefani AD 19."}],"kind":"fact","question":"How many members are in the California State Assembly?","distractors":["40","52","100"],"asOf":"2026-11-01"},{"id":"civ-senate-size","name":"40","tier":2,"explanation":"Each of the 40 senators represents about a million people — more than a member of Congress. All of San Francisco lies in Senate District 11.","sources":["ca-senate-senators","sd11-bio"],"tags":["state"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"senate.ca.gov lists 40 seats (one vacant); SD 11 is Scott Wiener; population per seat ~988k from 2020 Census 39.58M."}],"kind":"fact","question":"How many members are in the California State Senate?","distractors":["20","50","80"],"asOf":"2026-11-01"},{"id":"civ-house-seats","name":"52","tier":2,"explanation":"The 2020 Census apportionment gave California 52 seats, one fewer than before — the first loss in the state's history. San Francisco is split between CA-11 and CA-15.","sources":["census-apportionment-2020","house-representatives"],"tags":["federal"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Census 2020 apportionment Table 1 (pdftotext): California 52 seats, change -1; house.gov lists 52 California districts."}],"kind":"fact","question":"How many seats does California have in the US House of Representatives?","distractors":["45","53","55"],"asOf":"2026-11-01"},{"id":"civ-governance-form","name":"A consolidated city and county governed under its own charter","tier":1,"explanation":"The 1856 consolidation made the city and county one government, the only such arrangement in California. A voter-approved charter gives it a strong mayor, an eleven-member Board that is both city council and county board, and several independently elected department heads.","sources":["wp-government-sf","sf-charter-2-100"],"tags":["structure"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Wikipedia 'Government of San Francisco' (only consolidated city-county in California; strong-mayor charter; 11-member Board acts as council and county board; elected Assessor, City Attorney, DA, Public Defender, Sheriff, Treasurer); Charter 2.100."}],"kind":"fact","question":"How is San Francisco governed?","distractors":["A general-law city inside San Francisco County","A city-manager system with a ceremonial mayor","A federal district administered by the state"],"asOf":"2026-11-01"},{"id":"civ-ranked-choice","name":"2004","tier":2,"explanation":"Voters approved instant-runoff voting as Proposition A in March 2002 (Charter Sec. 13.102) and first used it in November 2004. Voters rank up to ten candidates and the last-place candidate is eliminated round by round until someone has a majority.","sources":["sfgov-rcv","sf-charter-13-102","fairvote-sf-irv-2002"],"tags":["elections"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"sf.gov ranked-choice page: used since November 2004, rank up to 10 candidates; Charter 13.102 (Wayback capture) lists covered offices; FairVote archive: Proposition A, March 5, 2002."}],"kind":"fact","question":"Since what year has San Francisco used ranked-choice voting for its local offices?","distractors":["1996","2000","2011"],"asOf":"2026-11-01"},{"id":"civ-election-years","name":"2024, and every four years after","tier":4,"explanation":"Charter Section 13.101 puts these five offices on the ballot in November 2024 and every fourth year, while the Assessor-Recorder and Public Defender run in 2022 and every fourth year — which is why only the latter two citywide offices appear on the November 3, 2026 ballot.","sources":["sf-charter-13-101","sfgov-candidates-nov-2026"],"tags":["elections"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:civics-check","date":"2026-11-01","method":"Charter Sec. 13.101(b) (Wayback capture, as amended by Prop H 2022): Mayor, Sheriff, DA, City Attorney, Treasurer elected 2024 and every fourth year; Assessor-Recorder and Public Defender 2022 and every fourth year; sf.gov Nov 3, 2026 candidate list shows only those two citywide offices."}],"kind":"fact","question":"When are the Mayor, Sheriff, District Attorney, City Attorney and Treasurer elected?","distractors":["2026, and every four years after","2022, and every four years after","Every two years"],"asOf":"2026-11-01"}]},{"id":"sf-figures","title":"People of San Francisco","subtitle":"Mayors, barons, Beats and rock stars","description":"The people who shaped San Francisco, from the Spanish expeditions and Gold Rush fortunes to the Beats, the Summer of Love and today's City Hall. Each card asks who did what and ties the person to a place you can still visit.","order":80,"accent":"lupine","sources":[{"id":"wp-harvey-milk","title":"Harvey Milk","url":"https://en.wikipedia.org/wiki/Harvey_Milk","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-harvey-milk-plaza","title":"Harvey Milk Plaza","url":"https://en.wikipedia.org/wiki/Harvey_Milk_Plaza","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-harvey-milk-terminal","title":"Harvey Milk Terminal 1","url":"https://en.wikipedia.org/wiki/Harvey_Milk_Terminal_1","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-moscone","title":"George Moscone","url":"https://en.wikipedia.org/wiki/George_Moscone","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-moscone-center","title":"Moscone Center","url":"https://en.wikipedia.org/wiki/Moscone_Center","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-feinstein","title":"Dianne 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Harvey Milk Plaza sits above the Castro Muni station, and SFO's Terminal 1 carries his name.","sources":["wp-harvey-milk","wp-harvey-milk-plaza","wp-harvey-milk-terminal"],"tags":["politics","lgbtq"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. Terminal 1 naming confirmed in SFO article (Harvey_Milk_Terminal_1 redirects there)."}],"kind":"person","knownFor":"was the first openly gay man elected to public office in California, winning a seat on the SF Board of Supervisors in 1977","born":1930,"died":1978,"distractors":["George Moscone","José Sarria","Sylvester"]},{"id":"fig-george-moscone","name":"George Moscone","tier":2,"explanation":"A San Francisco native, Moscone served as mayor from 1976 until Dan White shot him on 27 November 1978. The Moscone Center convention complex South of Market, opened in 1981, is named for him.","sources":["wp-moscone","wp-moscone-center"],"tags":["politics"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"was the San Francisco mayor assassinated at City Hall alongside Harvey Milk in November 1978","born":1929,"died":1978,"distractors":["Harvey Milk","Dianne Feinstein","Willie Brown"]},{"id":"fig-dianne-feinstein","name":"Dianne Feinstein","tier":1,"explanation":"As Board of Supervisors president, Feinstein announced the killings of Moscone and Milk and succeeded Moscone, serving as mayor from 1978 to 1988. She represented California in the US Senate from 1992 until her death, the longest Senate tenure of any woman.","sources":["wp-feinstein"],"tags":["politics"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed.","note":"Changed \"31 years\" to \"more than 30 years\" (Senate Nov 1992 – Sep 2023)."}],"kind":"person","knownFor":"became San Francisco's first woman mayor after the 1978 assassinations and later served more than 30 years as a US Senator","born":1933,"died":2023,"distractors":["Nancy Pelosi","London Breed","Kamala Harris"]},{"id":"fig-willie-brown","name":"Willie Brown","tier":1,"explanation":"Brown's 14 years as Assembly Speaker (1980–95) remain the longest tenure in state history, and he was mayor for two terms from January 1996 to January 2004. The western span of the Bay Bridge was officially named for him in 2013.","sources":["wp-willie-brown","ca-acr65-brown-bridge"],"tags":["politics"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia article plus enrolled ACR 65 (2013) text from leginfo.ca.gov, which recites longest-serving Speaker 1980–1995, first African American, mayor 1996–2004 and names the western span.","note":"Corrected \"15 years\" to 14 years; Wikipedia alone did not state the record."}],"kind":"person","knownFor":"was the record-setting Speaker of the California Assembly (1980–1995) and San Francisco's first Black mayor (1996–2004)","born":1934,"distractors":["Ed Lee","Gavin Newsom","George Moscone"]},{"id":"fig-nancy-pelosi","name":"Nancy Pelosi","tier":1,"explanation":"Pelosi was Speaker from 2007 to 2011 and 2019 to 2023 and led House Democrats for twenty years. She announced in November 2025 that she would not seek re-election in 2026, so her tenure ends in January 2027.","sources":["wp-pelosi"],"tags":["politics"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. Nov 2025 retirement announcement present in article."}],"kind":"person","knownFor":"has represented San Francisco in the US House since 1987 and was the first woman to serve as Speaker","born":1940,"distractors":["Dianne Feinstein","Kamala Harris","Willie Brown"]},{"id":"fig-emperor-norton","name":"Emperor Norton","tier":1,"explanation":"Joshua Norton, a ruined merchant, issued proclamations and his own scrip, which some restaurants accepted; he even called for a bridge from San Francisco to Oakland decades before the Bay Bridge opened. He collapsed on a street corner in January 1880 and is buried at Woodlawn in Colma.","sources":["wp-norton"],"tags":["eccentrics"],"aliases":["Joshua Norton","Joshua Abraham Norton"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. Birth year 1818 per article (1819 alternative noted there)."}],"kind":"person","knownFor":"declared himself 'Emperor of these United States' in 1859 and was indulged by San Franciscans for two decades","born":1818,"died":1880,"distractors":["Levi Strauss","José Sarria","Adolph Sutro"]},{"id":"fig-levi-strauss","name":"Levi Strauss","tier":1,"explanation":"Strauss opened his business in San Francisco in 1853 to supply Gold Rush merchants; the 1873 rivet patent made Levi's the first blue jeans. 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His 1896 Sutro Baths at Lands End burned in 1966; the ruins are now part of the national recreation area.","sources":["wp-sutro","wp-sutro-baths"],"tags":["business","politics"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. Mayor 1895–1897 per lead; owned 1/12 of city per article."}],"kind":"person","knownFor":"was the Comstock mining millionaire and mayor who built the Sutro Baths and the Victorian Cliff House","born":1830,"died":1898,"distractors":["Leland Stanford","Levi Strauss","Charles Crocker"]},{"id":"fig-leland-stanford","name":"Leland Stanford","tier":2,"explanation":"One of the 'Big Four' railroad barons, Stanford built a Nob Hill mansion that burned in 1906; the Stanford Court hotel occupies the site. He and his wife Jane founded the university in memory of their son; it opened in 1891.","sources":["wp-stanford"],"tags":["business","big-four"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"was the Central Pacific Railroad president, California governor and US senator who founded Stanford University","born":1824,"died":1893,"distractors":["Charles Crocker","Mark Hopkins","Collis Huntington"]},{"id":"fig-mark-hopkins","name":"Mark Hopkins","tier":3,"explanation":"Nicknamed 'Uncle Mark', Hopkins was the Big Four's bookkeeper. His ornate Nob Hill house was unfinished when he died and burned after the 1906 earthquake; the Mark Hopkins Hotel rose on the site in 1926.","sources":["wp-hopkins","wp-mark-hopkins-hotel"],"tags":["business","big-four"],"aliases":["Mark Hopkins Jr."],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. 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Grace Cathedral article confirms Crocker family donated the block."}],"kind":"person","knownFor":"was the Big Four railroad builder whose Nob Hill estate is now the site of Grace Cathedral","born":1822,"died":1888,"distractors":["Leland Stanford","Mark Hopkins","Collis Huntington"]},{"id":"fig-collis-huntington","name":"Collis Huntington","tier":3,"explanation":"Huntington ran the Central Pacific and Southern Pacific's business and lobbying, earning a reputation as one of the most hated railroad men in the country. His widow Arabella gave the land of their burned-out Nob Hill home to the city in 1915.","sources":["wp-huntington","wp-huntington-park"],"tags":["business","big-four"],"aliases":["Collis P. Huntington","Collis Potter Huntington"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"was the Big Four railroad magnate whose Nob Hill home site became Huntington Park","born":1821,"died":1900,"distractors":["Leland Stanford","Mark Hopkins","Charles Crocker"]},{"id":"fig-lillie-coit","name":"Lillie Hitchcock Coit","tier":2,"explanation":"Made an honorary member of Knickerbocker Engine Co. No. 5 in 1863, Coit left a third of her estate 'to add to the beauty of the city'. 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The eucalyptus trees she planted at Octavia and Bush mark the tiny park named for her.","sources":["wp-pleasant"],"tags":["civil-rights","business"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"was the Black entrepreneur and abolitionist called the 'Mother of civil rights in California'","born":1814,"died":1904,"distractors":["Lillie Hitchcock Coit","Juana Briones","Rose Pak"]},{"id":"fig-juana-briones","name":"Juana Briones","tier":4,"explanation":"Briones farmed at El Polín Spring in the Presidio, then built a house in the Yerba Buena settlement and sold milk and produce to sailors. Washington Square, where she grew potatoes and raised cattle, has a plaque to her.","sources":["wp-briones","wp-washington-square"],"tags":["early-sf"],"aliases":["Juana Briones de Miranda"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"was the rancher and healer called the 'Founding Mother of San Francisco' who farmed what is now North Beach","born":1802,"died":1889,"distractors":["Mary Ellen Pleasant","Lillie Hitchcock Coit","Juan Bautista de Anza"]},{"id":"fig-lawrence-ferlinghetti","name":"Lawrence Ferlinghetti","tier":1,"explanation":"Ferlinghetti was tried for obscenity in 1957 over 'Howl' and acquitted, a landmark for free expression. City Lights still stands at 261 Columbus Avenue in North Beach; he was named the city's first poet laureate in 1998 and lived to 101.","sources":["wp-ferlinghetti","wp-city-lights","poets-org-ferlinghetti"],"tags":["literature","beats"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. \"First\" poet laureate (1998) confirmed against poets.org biography."}],"kind":"person","knownFor":"co-founded City Lights bookstore in 1953 and published Allen Ginsberg's 'Howl'","born":1919,"died":2021,"distractors":["Allen Ginsberg","Jack Kerouac","Herb Caen"]},{"id":"fig-allen-ginsberg","name":"Allen Ginsberg","tier":1,"explanation":"The Six Gallery reading launched the San Francisco Renaissance of Beat poetry; City Lights published 'Howl' in 1956 and the 1957 obscenity trial made it famous. 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Jack Kerouac Alley, between Grant and Columbus in North Beach, was renamed for him and, at Ferlinghetti's urging, rebuilt as a pedestrian walkway in 2007.","sources":["wp-kerouac","wp-kerouac-alley"],"tags":["literature","beats"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed.","note":"Reworded alley sentence so the 2007 date attaches to the rebuild, which is what the source dates."}],"kind":"person","knownFor":"wrote 'On the Road' (1957) and gave his name to the alley beside City Lights","born":1922,"died":1969,"distractors":["Allen Ginsberg","Lawrence Ferlinghetti","Jack London"]},{"id":"fig-herb-caen","name":"Herb Caen","tier":2,"explanation":"Caen's 'three-dot' column ran in the Chronicle for almost sixty years, with a 1950s stint at the Examiner; he also gave the city the nickname 'Baghdad by the Bay'. He won a special Pulitzer in 1996, and the Embarcadero promenade is named Herb Caen Way.","sources":["wp-caen"],"tags":["journalism"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"wrote a daily San Francisco Chronicle column for almost sixty years and coined the word 'beatnik'","born":1916,"died":1997,"distractors":["Armistead Maupin","Lawrence Ferlinghetti","Jack London"]},{"id":"fig-armistead-maupin","name":"Armistead Maupin","tier":2,"explanation":"The serial began in Marin's Pacific Sun in 1974 before the Chronicle picked it up; it grew into a series of novels and television adaptations about a boarding house and its found family.","sources":["wp-maupin"],"tags":["literature"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"wrote 'Tales of the City', the serial about 28 Barbary Lane that ran in the San Francisco Chronicle from 1976","born":1944,"distractors":["Herb Caen","Dashiell Hammett","Jack Kerouac"]},{"id":"fig-dashiell-hammett","name":"Dashiell Hammett","tier":2,"explanation":"A former Pinkerton detective, Hammett wrote most of his hard-boiled fiction in San Francisco; Sam Spade's city is mapped onto real streets, and the character may have 'lived' in Hammett's own Post Street apartment.","sources":["wp-hammett","coggins-891-post"],"tags":["literature"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia article (891 Post St appears only in an image caption) plus markcoggins.com page on 891 Post Street and the Don Herron Hammett tour site confirming Hammett wrote The Maltese Falcon while living there."}],"kind":"person","knownFor":"wrote 'The Maltese Falcon' while living at 891 Post Street","born":1894,"died":1961,"distractors":["Jack London","Armistead Maupin","Herb Caen"]},{"id":"fig-jack-london","name":"Jack London","tier":2,"explanation":"London was born near Third and Brannan streets South of Market and raised in Oakland. 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The North Beach playground where he first played was renamed for him in 2000.","sources":["wp-dimaggio"],"tags":["sports"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"grew up in North Beach, starred for the San Francisco Seals and married Marilyn Monroe at City Hall","born":1914,"died":1999,"distractors":["Willie Mays","Barry Bonds","Carlos Santana"]},{"id":"fig-willie-mays","name":"Willie Mays","tier":2,"explanation":"Mays played 23 seasons, almost all of them for the Giants, and his No. 24 is retired; he entered the Hall of Fame in 1979. 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The Giants retired his No. 25.","sources":["wp-bonds"],"tags":["sports"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"hit a record 762 career home runs, most of them as a San Francisco Giant (1993–2007)","born":1964,"distractors":["Willie Mays","Joe DiMaggio","Robin Williams"]},{"id":"fig-bill-graham","name":"Bill Graham","tier":2,"explanation":"Graham began booking the Fillmore at 1805 Geary in December 1965 and went on to run Fillmore West, Fillmore East and Winterland. 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The amphitheater in McLaren Park was named for him in 2005.","sources":["wp-garcia"],"tags":["music"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"was the San Francisco-born lead guitarist of the Grateful Dead","born":1942,"died":1995,"distractors":["Janis Joplin","Carlos Santana","Bill Graham"]},{"id":"fig-janis-joplin","name":"Janis Joplin","tier":2,"explanation":"The Texas-born singer joined Big Brother in San Francisco in June 1966 and broke out at the 1967 Monterey Pop Festival; 'Cheap Thrills' (1968) made her a star. She died of an overdose in Los Angeles at 27.","sources":["wp-joplin"],"tags":["music"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"rose to fame fronting the Haight-Ashbury band Big Brother and the Holding Company","born":1943,"died":1970,"distractors":["Jerry Garcia","Sylvester","Carlos Santana"]},{"id":"fig-carlos-santana","name":"Carlos Santana","tier":2,"explanation":"Santana's family moved from Mexico to San Francisco, where he attended Mission High School. Bill Graham gave the band early Fillmore slots, and its 1969 Woodstock set made 'Soul Sacrifice' famous.","sources":["wp-santana"],"tags":["music"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed."}],"kind":"person","knownFor":"formed his Latin-rock band in the Mission District in 1966 before his breakout at Woodstock","born":1947,"distractors":["Jerry Garcia","Bill Graham","Janis Joplin"]},{"id":"fig-sylvester","name":"Sylvester","tier":3,"explanation":"Sylvester came to San Francisco in 1970 with the drag troupe the Cockettes and became the Castro's 'undisputed First Lady'. He was an inaugural honoree of the Castro's Rainbow Honor Walk in 2014.","sources":["wp-sylvester"],"tags":["music","lgbtq"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. \"First Lady\" quote appears in an image caption (Gamson biography)."}],"kind":"person","knownFor":"was the Castro's 'Queen of Disco', singer of 'You Make Me Feel (Mighty Real)'","born":1947,"died":1988,"distractors":["José Sarria","Harvey Milk","Janis Joplin"]},{"id":"fig-jose-sarria","name":"José Sarria","tier":3,"explanation":"Sarria sang at the Black Cat on Montgomery Street and won about 6,000 votes for supervisor in 1961. Styling himself 'Empress José I, the Widow Norton', he founded the Imperial Court charity network.","sources":["wp-sarria"],"tags":["lgbtq"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Re-read cited Wikipedia article(s) (plain-text extract via API, Oct–Nov 2026 revisions): dates, offices, places and every explanation claim confirmed. Birth year 1922 per article lead (birth certificate says 1923)."}],"kind":"person","knownFor":"was the drag performer who, in 1961, became the first openly gay candidate for public office in the US","born":1922,"died":2013,"distractors":["Harvey Milk","Sylvester","Phyllis Lyon and Del Martin"]},{"id":"fig-lyon-martin","name":"Phyllis Lyon and Del Martin","tier":3,"explanation":"Martin (1921–2008) and Lyon (1924–2020) started the first US lesbian organization in San Francisco. 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used as the summit coordinate (via Nominatim)."},{"id":"wiki-edgehill-mountain","title":"Edgehill Mountain","url":"https://en.wikipedia.org/wiki/Edgehill_Mountain","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-forest-hill","title":"Forest Hill, San Francisco","url":"https://en.wikipedia.org/wiki/Forest_Hill,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-diamond-heights","title":"Diamond Heights, San Francisco","url":"https://en.wikipedia.org/wiki/Diamond_Heights,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"glenparkhistory-diamond-heights","title":"Diamond Heights: A Product of 'Arrested Development'","url":"https://www.glenparkhistory.org/diamond-heights-c1l4v","publisher":"Glen Park Neighborhoods History Project","accessed":"2026-11-01"},{"id":"topoquest-diamond-heights-village","title":"Diamond Heights Village (GNIS populated place)","url":"https://www.topoquest.com/place-detail.php?id=1655371","publisher":"TopoQuest (USGS GNIS data)","accessed":"2026-11-01"},{"id":"osm-gold-mine-hill","title":"Gold Mine Hill (OSM peak node 7706067157)","url":"https://www.openstreetmap.org/node/7706067157","publisher":"OpenStreetMap","accessed":"2026-11-01"},{"id":"wiki-bayview-park","title":"Bayview Hill (Bayview Park)","url":"https://en.wikipedia.org/wiki/Bayview_Hill","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-mclaren-park","title":"John McLaren Park","url":"https://en.wikipedia.org/wiki/John_McLaren_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-cathedral-hill","title":"Cathedral Hill, San Francisco","url":"https://en.wikipedia.org/wiki/Cathedral_Hill,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-st-marys-cathedral","title":"Cathedral of Saint Mary of the Assumption (San Francisco)","url":"https://en.wikipedia.org/wiki/Cathedral_of_Saint_Mary_of_the_Assumption_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-alamo-square","title":"Alamo Square, San Francisco","url":"https://en.wikipedia.org/wiki/Alamo_Square,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-sutro-heights","title":"Sutro Heights Park","url":"https://en.wikipedia.org/wiki/Sutro_Heights_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-kite-hill","title":"Kite Hill, San Francisco","url":"https://en.wikipedia.org/wiki/Kite_Hill,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"osm-dolores-heights","title":"Dolores Heights (OSM peak node 7706067161)","url":"https://www.openstreetmap.org/node/7706067161","publisher":"OpenStreetMap","accessed":"2026-11-01"},{"id":"sfstandard-dolores-heights","title":"The low-key SF neighborhood where Airbnb and Instagram founders live","url":"https://sfstandard.com/housing-development/the-low-key-sf-neighborhood-where-airbnb-and-instagram-founders-live","publisher":"The San Francisco Standard","accessed":"2026-11-01"},{"id":"wiki-lincoln-heights","title":"Lincoln Heights (San Francisco)","url":"https://en.wikipedia.org/wiki/Lincoln_Heights_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-sutro-tower","title":"Sutro Tower","url":"https://en.wikipedia.org/wiki/Sutro_Tower","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-anza-vista","title":"Anza Vista, San Francisco","url":"https://en.wikipedia.org/wiki/Anza_Vista,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"presidio-rob-hill","title":"Rob Hill Campground","url":"https://presidio.gov/explore/attractions/rob-hill-campground","publisher":"Presidio Trust","accessed":"2026-11-01"},{"id":"wiki-irish-hill","title":"Irish Hill (San Francisco)","url":"https://en.wikipedia.org/wiki/Irish_Hill_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-holly-park","title":"Holly Park (San Francisco)","url":"https://en.wikipedia.org/wiki/Holly_Park_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-sf-mint","title":"San Francisco Mint","url":"https://en.wikipedia.org/wiki/San_Francisco_Mint","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"osm-christmas-tree-point","title":"Christmas Tree Point (OSM viewpoint node 599157316)","url":"https://www.openstreetmap.org/node/599157316","publisher":"OpenStreetMap","accessed":"2026-11-01"},{"id":"sfstandard-christmas-tree-point","title":"Why is the top of San Francisco's Twin Peaks called Christmas Tree Point?","url":"https://sfstandard.com/2023/12/04/why-is-the-top-of-san-franciscos-twin-peaks-called-christmas-tree-point/","publisher":"The San Francisco Standard","accessed":"2026-11-01"},{"id":"sfrecpark-hawk-hill","title":"Hawk Hill – SF Recreation and Parks","url":"https://sfrecpark.org/facilities/facility/details/Hawk-Hill-340","publisher":"SF Recreation & Park Department","accessed":"2026-11-01"},{"id":"osm-hawk-hill","title":"Hawk Hill Park (OSM way 587660490)","url":"https://www.openstreetmap.org/way/587660490","publisher":"OpenStreetMap","accessed":"2026-11-01"},{"id":"sfrecpark-brooks-park","title":"Brooks Park – SF Recreation and Parks","url":"https://sfrecpark.org/facilities/facility/details/Brooks-Park-153","publisher":"SF Recreation & Park Department","accessed":"2026-11-01"},{"id":"osm-brooks-park","title":"Brooks Park (OSM way 193055100)","url":"https://www.openstreetmap.org/way/193055100","publisher":"OpenStreetMap","accessed":"2026-11-01"},{"id":"wiki-merced-heights","title":"Merced Heights, San Francisco","url":"https://en.wikipedia.org/wiki/Merced_Heights,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-laurel-heights","title":"Laurel Heights, San Francisco","url":"https://en.wikipedia.org/wiki/Laurel_Heights,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-lone-mountain-cemetery","title":"Laurel Hill Cemetery (San Francisco)","url":"https://en.wikipedia.org/wiki/Laurel_Hill_Cemetery_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-yerba-buena-island","title":"Yerba Buena Island","url":"https://en.wikipedia.org/wiki/Yerba_Buena_Island","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-alcatraz","title":"Alcatraz Island","url":"https://en.wikipedia.org/wiki/Alcatraz_Island","publisher":"Wikipedia","accessed":"2026-11-01"}],"items":[{"id":"telegraph-hill","name":"Telegraph Hill","tier":1,"explanation":"Named for the 1849 semaphore on its top that signalled what kind of ship was entering the Golden Gate; California's first electric telegraph station replaced it in 1853. Coit Tower (1933), paid for by Lillie Hitchcock Coit's bequest, crowns it, and the sheer bay-side cliffs are the scar left by quarrying rock for ships' ballast.","sources":["wiki-telegraph-hill","gnis-telegraph-hill","usgs-epqs"],"tags":["seven-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659965 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.80236,"lon":-122.40583,"category":"hill","toleranceKm":0.45,"elevationFt":285,"hint":"Coit Tower stands on top. Wikipedia infobox gives 285 ft; USGS EPQS reads about 300 ft at the GNIS summit point."},{"id":"nob-hill","name":"Nob Hill","tier":1,"explanation":"Called California Hill until the Central Pacific's Big Four built their mansions here and locals dubbed them the 'nobs' (from nabob, a rich man). The 1906 fire destroyed every mansion; only the granite retaining walls of the Stanford, Crocker, Huntington and Hopkins estates survived, and the gutted Fairmont was refurbished to open as a hotel.","sources":["wiki-nob-hill","gnis-nob-hill","wiki-list-hills","usgs-epqs"],"tags":["seven-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659237 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.79358,"lon":-122.41509,"category":"hill","toleranceKm":0.45,"elevationFt":376,"hint":"Grace Cathedral, the Fairmont and the Pacific-Union Club share the summit. Elevation 376 ft per the Wikipedia hills list; USGS EPQS reads 372 ft at the GNIS point."},{"id":"russian-hill","name":"Russian Hill","tier":1,"explanation":"Gold Rush settlers found a small Russian cemetery on the summit, graves of sailors from Russian ships that called here, and the name outlived the graves. A plaque placed by the Russian government marks the Vallejo Street crest, and the eight switchbacks of Lombard Street (built 1922 to tame a 27% grade) curl down its north slope.","sources":["wiki-russian-hill","gnis-russian-hill","wiki-list-hills","usgs-epqs"],"tags":["seven-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659561 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.7977,"lon":-122.41453,"category":"hill","toleranceKm":0.45,"elevationFt":351,"hint":"Point is the GNIS summit at the Vallejo Street crest near Jones. Elevation 351 ft is USGS EPQS at that point; the Wikipedia hills list gives 294 ft."},{"id":"rincon-hill","name":"Rincon Hill","tier":1,"explanation":"In the 1850s and 60s this low knoll south of Market was the city's most prestigious address, home to William Tecumseh Sherman and banker William Ralston. The 1869 Second Street Cut carved a 100-foot canyon through it and the neighborhood collapsed; today it hides almost invisibly beneath the Bay Bridge approach under towers like One Rincon Hill.","sources":["wiki-rincon-hill","gnis-rincon-hill","usgs-epqs"],"tags":["seven-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659512 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.78573,"lon":-122.3921,"category":"hill","toleranceKm":0.45,"elevationFt":109,"hint":"Wikipedia calls the hill 'about 100 ft'; USGS EPQS reads 109 ft at the GNIS summit point."},{"id":"mount-sutro","name":"Mount Sutro","tier":1,"explanation":"Originally Mount Parnassus, renamed for Adolph Sutro (mayor 1894–96), who owned it and planted the dense eucalyptus forest that now gets 30–40% of its moisture from fog drip. UCSF owns most of the mountain; the summit lies in a 61-acre Open Space Reserve with the Rotary Meadow native-plant garden. Sutro Tower is not on it but on a lower hill to the south.","sources":["wiki-mount-sutro","gnis-mount-sutro","usgs-epqs"],"tags":["seven-hills"],"aliases":["Mount Parnassus"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 253951 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75826,"lon":-122.45719,"category":"hill","toleranceKm":0.45,"elevationFt":911,"hint":"Infobox 911 ft (text says 909); GNIS/USGS EPQS 912 ft."},{"id":"twin-peaks","name":"Twin Peaks","tier":1,"explanation":"Spanish settlers called the pair 'Los Pechos de la Chola'; the north summit is Eureka Peak and the south is Noe Peak, about 660 ft apart and each just over 900 ft. The 31-acre natural area shelters the endangered Mission blue butterfly, and since 1995 volunteers have unfurled a pink sailcloth triangle facing the Castro every Pride month.","sources":["wiki-twin-peaks","gnis-twin-peaks","wiki-list-hills","usgs-epqs"],"tags":["seven-hills"],"aliases":["Eureka Peak","Noe Peak","Los Pechos de la Chola"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 236709 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75159,"lon":-122.44774,"category":"hill","toleranceKm":0.45,"elevationFt":925,"hint":"Point is the GNIS 'Twin Peaks' summit. Infobox 925 ft; the hills list gives Eureka Peak 904 ft and Noe Peak 910 ft; USGS EPQS 920 ft at the GNIS point."},{"id":"mount-davidson","name":"Mount Davidson","tier":1,"explanation":"At 928 ft the highest natural point in San Francisco, named after Adolph Sutro's death for geographer George Davidson, a charter member of the Sierra Club. The 103-ft concrete cross finished in 1934 was first lit by Franklin Roosevelt via telegraph from the White House; the Council of Armenian American Organizations later bought it for $26,000 and added a plaque to the 1915 genocide. An Easter sunrise service is held each year.","sources":["wiki-mount-davidson","gnis-mount-davidson","usgs-epqs"],"tags":["seven-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1658377 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.73826,"lon":-122.45463,"category":"hill","toleranceKm":0.45,"elevationFt":928,"hint":"The big cross. The city bought the first 20 acres for a park in 1929."},{"id":"bernal-heights","name":"Bernal Heights","tier":2,"explanation":"Part of the 4,446-acre Rancho Rincon de las Salinas y Potrero Viejo granted to José Cornelio Bernal in 1839. The grassy summit exposes folded layers of radiolarian chert stained red by iron oxide, carries a microwave transmission tower that is a key relay for the metro area, and looks straight across at the downtown skyline.","sources":["wiki-bernal-heights","gnis-bernal-heights","wiki-list-hills","usgs-epqs"],"aliases":["Bernal Hill"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1658039 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.74316,"lon":-122.41512,"category":"hill","toleranceKm":0.45,"elevationFt":461,"hint":"Bernal Hill summit by the tower. USGS EPQS 461 ft at the GNIS summit; the Wikipedia hills list gives 433 ft."},{"id":"potrero-hill","name":"Potrero Hill","tier":2,"explanation":"'Potrero Nuevo', the new pasture where mission cattle grazed in the late 1700s. It is one of the sunniest neighborhoods in the city, and Vermont Street between 20th and 22nd has seven hairpins, more than Lombard. O.J. Simpson grew up in the housing projects on its southeast slope.","sources":["wiki-potrero-hill","gnis-potrero-hill","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659429 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75686,"lon":-122.39945,"category":"hill","toleranceKm":0.45,"elevationFt":341,"hint":"Wikipedia: high point about 341 ft at the site of a water tower demolished in 2006. USGS EPQS 324 ft at the GNIS point; hills list 300 ft."},{"id":"corona-heights","name":"Corona Heights","tier":2,"explanation":"A bare knob of terra-cotta-red Franciscan chert once called Rock Hill or 'the Fist', site of a 19th-century quarry and brick factory that closed by the 1920s. The city bought it in 1941 and named it Corona Heights; the Randall Museum sits in the park below the summit.","sources":["wiki-corona-heights","wiki-list-hills","usgs-epqs"],"aliases":["Rock Hill"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"moved point 40 m N to EPQS summit (496 ft); kept Wikipedia 520 (within 25 ft)"}],"kind":"place","map":"sf","lat":37.765,"lon":-122.4393,"category":"hill","toleranceKm":0.45,"elevationFt":520,"hint":"Point is the chert summit, 40 m north of the Wikipedia article coordinate. Wikipedia gives 520 ft (one passage says 540); the hills list 510 ft; USGS EPQS reads 496 ft at the summit."},{"id":"buena-vista-park","name":"Buena Vista Park","tier":2,"explanation":"Set aside in 1867 as Hill Park, the oldest official park in San Francisco. WPA crews lined the gutters along its western paths with broken headstones from the Lone Mountain cemeteries emptied to Colma in the 1930s; in a few places the inscriptions still face up and can be read.","sources":["wiki-buena-vista-park","wiki-list-hills","usgs-epqs"],"aliases":["Buena Vista Heights"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"moved point 60 m SW to EPQS summit (573 ft); Wikipedia coordinate reads only 517 ft"}],"kind":"place","map":"sf","lat":37.76785,"lon":-122.4416,"category":"hill","toleranceKm":0.45,"elevationFt":575,"hint":"Point is the hilltop in the park's south-west quarter, 60 m from the Wikipedia coordinate. Hilltop 575 ft per Wikipedia; hills list 569 ft; USGS EPQS 573 ft at the point."},{"id":"lone-mountain","name":"Lone Mountain","tier":2,"explanation":"The Spanish called it El Divisadero, a place to see far from. For most of the 19th century it stood ringed by Lone Mountain Cemetery (the Laurel Hill, Calvary, Masonic and Odd Fellows grounds). Today the north half of the University of San Francisco campus sits on it; Lone Mountain College, founded 1898 as Sacred Heart Academy, merged into USF in 1978.","sources":["wiki-lone-mountain","gnis-lone-mountain","wiki-list-hills","usgs-epqs"],"aliases":["El Divisadero"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659001 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.7791,"lon":-122.45192,"category":"hill","toleranceKm":0.45,"elevationFt":421,"hint":"Infobox 421 ft (NAVD 88); the hills list says 448 ft."},{"id":"strawberry-hill","name":"Strawberry Hill","tier":2,"explanation":"An island hill in Stow Lake (now officially Blue Heron Lake), the highest point in Golden Gate Park. Huntington Falls, a 110-ft artificial cascade paid for with $25,000 from railroad baron Collis Huntington, pours down it, and the ruined foundations of the Sweeney Observatory (1891, wrecked in 1906) remain on top. The Golden Gate Pavilion nearby was a 1976 gift from sister city Taipei.","sources":["wiki-strawberry-hill","gnis-strawberry-hill","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659887 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.76854,"lon":-122.47551,"category":"hill","toleranceKm":0.45,"elevationFt":404,"hint":"Infobox 404 ft (NAVD 88); USGS EPQS 423 ft at the GNIS point; hills list 412 ft."},{"id":"tank-hill","name":"Tank Hill","tier":2,"explanation":"Named for the 500,000-gallon Clarendon Heights water tank the Spring Valley Water Company built on top in 1894; after Pearl Harbor the Army planted blue gum eucalyptus around it as camouflage. The tank came out in 1957, leaving a concrete platform and a 270-degree panorama that fills with people every Fourth of July.","sources":["wiki-tank-hill","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"elevation 650 -> 606 (USGS EPQS summit); 650 exceeds terrain by ~45 ft"}],"kind":"place","map":"sf","lat":37.75982,"lon":-122.44769,"category":"hill","toleranceKm":0.45,"elevationFt":606,"hint":"Above Cole Valley and Ashbury Heights. Wikipedia and the hills list give 650 ft, but USGS 3DEP lidar (EPQS) tops out at about 606 ft on the old tank platform, so 650 is overstated; 606 is the USGS figure."},{"id":"billy-goat-hill","name":"Billy Goat Hill","tier":2,"explanation":"A 3.5-acre remnant of a Gray Brothers quarry worked in the late 1800s and early 1900s at 30th and Laidley, where Noe Valley meets Glen Park. After the quarry closed it became a neighborhood common and dumping ground, then a city park in 1975; its famous wooden rope swing in an old eucalyptus was removed by Rec & Park during renovations.","sources":["wiki-billy-goat-hill","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.74145,"lon":-122.43302,"category":"hill","toleranceKm":0.45,"elevationFt":363,"hint":"USGS EPQS 363 ft at the Wikipedia coordinate; the hills list gives 354 ft."},{"id":"mount-olympus","name":"Mount Olympus","tier":2,"explanation":"Once considered the geographic center of San Francisco. Adolph Sutro crowned it with a statue called 'Triumph of Light'; the statue is long gone and only its pedestal remains at the end of Upper Terrace, in the Buena Vista / Ashbury Heights area.","sources":["wiki-mount-olympus","gnis-mount-olympus","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1659303 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.76327,"lon":-122.44549,"category":"hill","toleranceKm":0.45,"elevationFt":553,"hint":"Infobox 553 ft; GNIS/USGS EPQS 561–563 ft; hills list 570 ft."},{"id":"pacific-heights","name":"Pacific Heights","tier":2,"explanation":"The ridge of mansions north of California Street tops out about 370 ft. Lafayette Park (12.5 acres, bounded by Washington, Sacramento, Gough and Laguna) caps the hilltop; the Spreckels Mansion of sugar baron Adolph B. Spreckels and the Whittier Mansion, which served as the German Reich's West Coast headquarters in World War II, are nearby.","sources":["wiki-pacific-heights","wiki-lafayette-park","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia Lafayette Park coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point nudged 70 m NE to park high point (EPQS 377 vs 353 at centre)"}],"kind":"place","map":"sf","lat":37.79186,"lon":-122.42769,"category":"hill","toleranceKm":0.45,"elevationFt":370,"hint":"Point is the high ground of Lafayette Park, on the hilltop. Elevation 370 ft is Wikipedia's figure for the ridge's highest point; USGS EPQS reads 377 ft at the point."},{"id":"grand-view-park","name":"Grand View Park (Turtle Hill)","tier":3,"explanation":"A knob of Franciscan chert under a thin skin of dune sand in Golden Gate Heights, called Turtle Hill by locals, with the Farallones, the Golden Gate and Sutro Tower all in view on a clear day. It hosts two of the city's last native plants, the Franciscan wallflower and dune tansy, and the 163-panel 16th Avenue Tiled Steps (2005) climb to it from Moraga Street.","sources":["wiki-grand-view-park","thefrisc-golden-gate-heights","wiki-list-hills","usgs-epqs"],"aliases":["Turtle Hill","Grandview Park"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point nudged 30 m S to hilltop (EPQS 669 vs 645); hint added"}],"kind":"place","map":"sf","lat":37.75619,"lon":-122.4718,"category":"hill","toleranceKm":0.4,"elevationFt":666,"hint":"Point is the hilltop. Wikipedia and The Frisc give 666 ft; USGS EPQS 669 ft at the point."},{"id":"larsen-peak","name":"Larsen Peak (Golden Gate Heights Park)","tier":3,"explanation":"The highest point in Golden Gate Heights, hidden in the Monterey pines of Golden Gate Heights Park, land that Danish immigrant Carl Larsen gave to the city in the 1920s. Higher than neighbouring Grand View Park but with far fewer views; the park is a link in the Green Hairstreak Corridor for a butterfly that travels only about 300 ft from where it hatches.","sources":["thefrisc-golden-gate-heights","osm-golden-gate-heights-park","wiki-list-hills","usgs-epqs"],"aliases":["Golden Gate Heights","Golden Gate Heights Park"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against OSM way 128241105 centroid (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"tolerance 0.4 -> 0.25 km (Forest Hill summit 270 m away); hint notes EPQS 760-764"}],"kind":"place","map":"sf","lat":37.74999,"lon":-122.46957,"category":"hill","toleranceKm":0.25,"elevationFt":774,"hint":"Point is the park centroid. The Frisc gives 774 ft; the Wikipedia hills list 725 ft; USGS EPQS reads 760-764 ft in the park, so 725 is too low. The 787-ft water-tank knoll 270 m south-east is listed as Forest Hill's summit."},{"id":"edgehill-mountain","name":"Edgehill Mountain","tier":3,"explanation":"A wooded ridge on the western greenbelt that links Mount Davidson, Hawk Hill, Twin Peaks and the Laguna Honda Reservoir. It is prone to slides: in 1952–53 part of Edgehill Way and a house slid downhill, and in 1997 a slope above new homes collapsed in a storm. The city bought about an acre of the undeveloped west slope in 1985 as Edgehill Mountain Park.","sources":["wiki-edgehill-mountain","wiki-list-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.74271,"lon":-122.45926,"category":"hill","toleranceKm":0.4,"elevationFt":734,"hint":"Infobox 734 ft; hills list 725 ft."},{"id":"forest-hill","name":"Forest Hill","tier":3,"explanation":"A hillside enclave laid out from 1912 to a master plan by landscape architect Mark Daniels, with winding streets, stairways and several houses and the neighborhood clubhouse designed by Bernard Maybeck. The ridge above it, topped by two water tanks at the west end of Mendosa Avenue, rises to about 790 ft, making it one of the tallest residential hills in the city.","sources":["wiki-forest-hill","wiki-list-hills","localwiki-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia hills-list description of the summit (west end of Mendosa Ave) (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point moved from neighbourhood centre (579 ft) to the hills-list summit at the Mendosa Ave water tanks; elevation 800 -> 787 (USGS EPQS); tolerance 0.4 -> 0.25 km to limit overlap with Larsen Peak"}],"kind":"place","map":"sf","lat":37.74822,"lon":-122.46733,"category":"hill","toleranceKm":0.25,"elevationFt":787,"hint":"Point is the knoll with two water tanks at the west end of Mendosa Avenue, which the Wikipedia hills list names as the top of Forest Hill. The list gives 800 ft and LocalWiki 778 ft; USGS EPQS reads 787 ft at the point. Larsen Peak in Golden Gate Heights Park is 270 m north-west."},{"id":"red-rock-hill","name":"Red Rock Hill (Diamond Heights)","tier":3,"explanation":"One of the three hills (with Gold Mine and Fairmount) that the Redevelopment Agency's Diamond Heights project built over between 1950 and 1978, the first project of SPUR and one meant to work with the topography rather than flatten it. Red Rock Hill's own summit was nonetheless leveled, and Diamond Heights Village (1972) sits where it stood. The name comes from Diamond Street.","sources":["glenparkhistory-diamond-heights","wiki-diamond-heights","topoquest-diamond-heights-village","wiki-list-hills","usgs-epqs"],"aliases":["Diamond Heights"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1655371 Diamond Heights Village (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"hint clarified: historic figure kept, summit levelled (Glen Park history), EPQS 639-651"}],"kind":"place","map":"sf","lat":37.74576,"lon":-122.44164,"category":"hill","toleranceKm":0.4,"elevationFt":689,"hint":"Point is Diamond Heights Village (GNIS populated place) on the leveled summit. Historic height 689 ft (hills list; Glen Park history 690); the summit was leveled for redevelopment and USGS EPQS reads 639-651 ft today."},{"id":"bayview-hill","name":"Bayview Hill","tier":3,"explanation":"Its north and east slopes were quarried for fill when Candlestick Park was built in 1958; the hill was kept as a windbreak but ended up funnelling wind into the stands. The KYA radio transmitter building on the summit (1937) was designed by Julia Morgan, and a stand of Islais cherry grows near the top beside wildflowers found wild nowhere else in the city.","sources":["wiki-bayview-park","gnis-bay-view-hill","wiki-list-hills","usgs-epqs"],"aliases":["Bay View Hill","Candlestick Point"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1655330 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.71508,"lon":-122.39337,"category":"hill","toleranceKm":0.4,"elevationFt":463,"hint":"Sources disagree: GNIS/USGS EPQS 463 ft; Wikipedia article 425 ft; hills list 500 ft (as 'Bayview Hill' / 'Candlestick Point')."},{"id":"visitacion-knob","name":"Visitacion Knob (McLaren Park)","tier":3,"explanation":"The high point of 313-acre John McLaren Park (created 1926 and named for Golden Gate Park's long-time superintendent), near the blue La Grande water tank. The 2.7-mile Philosopher's Way loop with fourteen stone 'musing stations' opened in 2013, and the park's 1970 amphitheatre was renamed for Jerry Garcia in 2005.","sources":["gnis-visitacion-knob","wiki-mclaren-park","wiki-list-hills","usgs-epqs"],"aliases":["McLaren Ridge"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1655580 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.71909,"lon":-122.4219,"category":"hill","toleranceKm":0.4,"elevationFt":522,"hint":"GNIS/USGS EPQS 522 ft; the hills list calls it McLaren Ridge, 515 ft."},{"id":"cathedral-hill","name":"Cathedral Hill","tier":3,"explanation":"A modest rise at Van Ness and Geary in the Western Addition, named for St. Mary's Cathedral at 1111 Gough Street (consecrated 1971), whose swooping roof earned it the nicknames 'Our Lady of Maytag' and 'Our Lady of Perpetual Agitation'. Gladys Hansen's SF Almanac added it to the city's traditional hill list.","sources":["wiki-cathedral-hill","wiki-st-marys-cathedral","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.78423,"lon":-122.42537,"category":"hill","toleranceKm":0.4,"elevationFt":206},{"id":"alamo-square","name":"Alamo Square (Alamo Hill)","tier":3,"explanation":"Named for a lone cottonwood, an álamo, that marked a watering hole on the 1800s horse trail between Mission Dolores and the Presidio; Mayor James Van Ness set the hilltop aside as a park in 1856. The 'Postcard Row' Painted Ladies on Steiner Street line its east side with the skyline behind.","sources":["wiki-alamo-square","wiki-list-hills","usgs-epqs"],"aliases":["Alamo Heights","Alamo Hill"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"hint clarified"}],"kind":"place","map":"sf","lat":37.77638,"lon":-122.43471,"category":"hill","toleranceKm":0.4,"elevationFt":249,"hint":"USGS EPQS 249 ft at the park center, rising to about 270 ft at the park's south edge on Hayes Street; the hills list ('Alamo Heights') says 225 ft."},{"id":"sutro-heights","name":"Sutro Heights","tier":3,"explanation":"The bluff above the Cliff House where Adolph Sutro bought 22 acres in 1881, built his mansion and filled the gardens with more than 200 concrete copies of Greek and Roman statues from Belgium, opening them to the public for a dime by 1883. The family gave it to the city in 1938, the WPA razed the house in 1939, and only the entrance lions and a Diana remain in what is now part of the GGNRA.","sources":["wiki-sutro-heights","wiki-list-hills"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.77826,"lon":-122.51108,"category":"hill","toleranceKm":0.4,"elevationFt":200,"hint":"Hills list 200 ft; USGS EPQS reads 178 ft at the park coordinate."},{"id":"kite-hill","name":"Kite Hill","tier":3,"explanation":"A 2.87-acre grassy knoll above Eureka Valley at 19th and Yukon, named for its gusty winds, with a panoramic view across the Castro to downtown. The city bought it in 1977 and folded it into the Natural Areas Program.","sources":["wiki-kite-hill","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia/Wikidata coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75833,"lon":-122.44167,"category":"hill","toleranceKm":0.4,"elevationFt":350,"hint":"Wikipedia 350 ft; USGS EPQS 369 ft at the Wikipedia coordinate."},{"id":"dolores-heights","name":"Dolores Heights","tier":3,"explanation":"The steep hill between the Castro, the Mission and Noe Valley where Sanchez Street has to zigzag over the top and Cumberland Street is reached mainly by stairs. Victorian builder Fernando Nelson filled it with modest homes for working-class families; today it houses tech founders, and Mark Zuckerberg sold his place here for $31 million in 2022.","sources":["osm-dolores-heights","sfstandard-dolores-heights","wiki-list-hills","usgs-epqs"],"aliases":["Liberty Hill"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against OSM node 7706067161 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75612,"lon":-122.43093,"category":"hill","toleranceKm":0.4,"elevationFt":390,"hint":"Point is the OSM 'peak' node. USGS EPQS 390 ft there; the hills list gives 360 ft (as 'Dolores Heights / Liberty Hill')."},{"id":"lincoln-heights","name":"Lincoln Heights","tier":3,"explanation":"The hilltop at Lands End in the city's northwest corner, crowned by the Legion of Honor museum and ringed by the Lincoln Park golf course and the Lands End trails. Wikipedia ranks it the city's 24th highest peak.","sources":["wiki-lincoln-heights","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.7822,"lon":-122.4998,"category":"hill","toleranceKm":0.4,"elevationFt":380},{"id":"sutro-tower-hill","name":"Sutro Tower hill (Clarendon Heights)","tier":3,"explanation":"The hill between Twin Peaks and Mount Sutro that carries the 977-ft Sutro Tower (completed 1973), whose base sits at 834 ft. Most people assume the tower stands on Mount Sutro; it does not, and this unnamed summit is why the three red-and-white legs dominate the skyline.","sources":["wiki-sutro-tower","wiki-mount-sutro"],"aliases":["Clarendon Heights","Sutro Tower"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia Sutro Tower coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75523,"lon":-122.45284,"category":"hill","toleranceKm":0.4,"elevationFt":834,"hint":"Elevation is the tower's base elevation given by Wikipedia; the hill itself has no GNIS name. The 'Clarendon Heights' label is the surrounding neighborhood name and is not stated in the cited sources."},{"id":"alcatraz-island","name":"Alcatraz Island","tier":3,"explanation":"Not on the mainland, but one of the city's named summits: a 22-acre rock rising 135 ft above the bay. Ayala's 1775 name 'Isla de los Alcatraces' (pelicans) originally belonged to Yerba Buena Island and migrated here. It holds the first lighthouse on the West Coast, was a federal prison from 1934 to 1963, and was occupied by Native American activists from November 1969 to June 1971.","sources":["wiki-alcatraz"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 218080 (island) (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.82667,"lon":-122.42278,"category":"hill","toleranceKm":0.4,"elevationFt":135,"hint":"Island summit; 135 ft above mean high tide."},{"id":"anza-vista","name":"Anza Vista","tier":4,"explanation":"A post-cemetery hill: the neighborhood sits on the former Calvary Cemetery, whose graves were moved to Colma in the 1930s and 40s after the 1902 ban on new burials. It is named for Juan Bautista de Anza, who led the 1776 expedition that founded the Presidio and Mission.","sources":["wiki-anza-vista","wiki-list-hills","usgs-epqs"],"aliases":["Anza Hill"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point moved 150 m SW to local high point; elevation 314 -> 351 (USGS EPQS)"}],"kind":"place","map":"sf","lat":37.77997,"lon":-122.44433,"category":"hill","toleranceKm":0.4,"elevationFt":351,"hint":"Point is the neighborhood's high ground near Anza Vista Avenue, 150 m south-west of the Wikipedia coordinate. USGS EPQS reads 351 ft there (314 ft at the Wikipedia point), so the hills list's 260 ft ('Anza Hill') is too low."},{"id":"rob-hill","name":"Rob Hill","tier":4,"explanation":"The highest point in the Presidio, a cypress-shaded knoll above the Pacific that holds Rob Hill Campground, the city's only group campground (four sites of up to 30 people each). Army records say monarch butterflies have overwintered in the nearby eucalyptus since the early 1800s.","sources":["gnis-rob-hill","presidio-rob-hill","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1878685 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.79563,"lon":-122.4765,"category":"hill","toleranceKm":0.4,"elevationFt":381,"hint":"GNIS summit; USGS EPQS 381 ft."},{"id":"irish-hill","name":"Irish Hill","tier":4,"explanation":"A 250-ft hill near Illinois and 20th where Irish immigrants settled in the 1860s in about 60 small houses and 40 boarding houses, ruled by Union Hotel proprietor and political boss Frank McManus, 'King of Irish Hill'. Quarried in the 1880s for Long Bridge fill and dynamited from 1897 to expand Union Iron Works, by 1918 it was a mound under 50 ft, which is all that remains beside Pier 70.","sources":["wiki-irish-hill","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikidata P625 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75865,"lon":-122.38636,"category":"hill","toleranceKm":0.4,"elevationFt":250,"hint":"Elevation is the historic height; the hill was leveled (USGS EPQS reads about 41 ft at the point today)."},{"id":"holly-hill","name":"Holly Hill (Holly Park)","tier":4,"explanation":"A round hilltop park in Bernal Heights on land James Graham Fair donated in 1862, making it one of San Francisco's oldest city parks. Paths circle the 8.15-acre summit with views over the city and bay; the slopes were landscaped in the 1920s.","sources":["wiki-holly-park","wiki-list-hills","usgs-epqs"],"aliases":["Holly Park"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (GNIS 225459) (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point moved 60 m NE to park top; elevation 274 -> 302 (USGS EPQS)"}],"kind":"place","map":"sf","lat":37.73769,"lon":-122.42012,"category":"hill","toleranceKm":0.4,"elevationFt":302,"hint":"Point is the top of Holly Park. USGS EPQS 302 ft; the hills list gives 274 ft."},{"id":"mint-hill","name":"Mint Hill","tier":4,"explanation":"The small rise at Hermann and Buchanan above Market Street where the 'new' San Francisco Mint was dedicated on May 15, 1937. The hill and the surrounding streets near Duboce Triangle take their name from it.","sources":["wiki-sf-mint","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.7701,"lon":-122.4273,"category":"hill","toleranceKm":0.4,"elevationFt":157,"hint":"Point is the Mint building. Hills list 157 ft; USGS EPQS 159 ft."},{"id":"gold-mine-hill","name":"Gold Mine Hill","tier":4,"explanation":"The southern of Diamond Heights' three hills, with Glenridge Cooperative on its south slopes and the Christopher Playground in the saddle between it and Red Rock Hill. The Redevelopment Agency designated the area in 1950 and closed the project in 1978; a surviving 1895 farmhouse at 70 Gold Mine Drive predates all of it.","sources":["glenparkhistory-diamond-heights","wiki-diamond-heights","osm-gold-mine-hill","wiki-list-hills","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against OSM node 7706067157 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"hint clarified (levelled summit, EPQS 654-660)"}],"kind":"place","map":"sf","lat":37.74135,"lon":-122.43744,"category":"hill","toleranceKm":0.4,"elevationFt":679,"hint":"Point is the OSM peak node. Hills list 679 ft; Glen Park history 680 ft; the summit was leveled in redevelopment and USGS EPQS reads 654-660 ft today."},{"id":"christmas-tree-point","name":"Christmas Tree Point","tier":4,"explanation":"The viewpoint and parking lot about 70 ft below Twin Peaks' north summit. In 1927 the San Francisco Examiner hauled a 120-ft Mendocino fir up here, split for transport and reassembled under thousands of lights, while Shell Oil built a 'Santa's Gate' over Twin Peaks Boulevard; the stunt lasted only a few years but the name stuck. Police and fire radio towers stand there today.","sources":["sfstandard-christmas-tree-point","wiki-twin-peaks","osm-christmas-tree-point","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against OSM node 599157316 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.75493,"lon":-122.44664,"category":"hill","toleranceKm":0.4,"elevationFt":856,"hint":"USGS EPQS 856 ft at the OSM viewpoint node, consistent with Wikipedia's 'some 70 ft below the North Peak'."},{"id":"hawk-hill","name":"Hawk Hill (Golden Gate Heights)","tier":4,"explanation":"The southern end of the Golden Gate Heights ridge at 14th Avenue and Rivera: a 'magnificent remnant hilltop dune', shifting sand that still supports the rare California croton and San Francisco wallflower and the green hairstreak butterfly. There are no trails and access is discouraged because the dune has no new sand to replace what erodes.","sources":["sfrecpark-hawk-hill","thefrisc-golden-gate-heights","osm-hawk-hill","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against OSM way 587660490 centroid (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.74658,"lon":-122.46856,"category":"hill","toleranceKm":0.4,"elevationFt":682,"hint":"Not the Marin Headlands Hawk Hill. Elevation is USGS EPQS at the OSM polygon centroid."},{"id":"brooks-park","name":"Merced Heights (Brooks Park)","tier":4,"explanation":"The southwesternmost hill in San Francisco, at 373 Ramsell Street, with views to the Pacific, the Farallones and Mount Tamalpais. The Brooks family owned the half-acre hilltop; a 1990 grant let neighbours buy the surrounding six acres, and the park now hosts a community garden and native-plant work parties. The neighborhood's official high point, the Shields-Orizaba rocky outcrop, is 500 ft.","sources":["sfrecpark-brooks-park","wiki-merced-heights","osm-brooks-park","wiki-list-hills","usgs-epqs"],"aliases":["Merced Heights","Brooks Park"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against OSM way 193055100 centroid (GNIS Merced Heights 180 m) (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.71732,"lon":-122.46671,"category":"hill","toleranceKm":0.4,"elevationFt":493,"hint":"Point is Brooks Park (OSM polygon centroid); USGS EPQS 493 ft there. The hills list gives Merced Heights 500 ft at the Shields-Orizaba outcrop nearby."},{"id":"laurel-hill","name":"Laurel Hill (Laurel Heights)","tier":4,"explanation":"The site of Lone Mountain Cemetery, opened May 30, 1854 and renamed Laurel Hill in 1867, where David Broderick, Phineas Gage, William Ralston and cable-car inventor Andrew Hallidie were buried. The bodies went to Colma between 1940 and about 1945, the headstones were recycled into Buena Vista Park gutters and the Aquatic Park seawall, and housing and shops rose on the hill; UCSF's Laurel Heights campus moved out in 2023.","sources":["wiki-lone-mountain-cemetery","wiki-laurel-heights","wiki-list-hills","usgs-epqs"],"aliases":["Laurel Heights"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia Lone Mountain Cemetery coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point moved 200 m E to the hilltop; elevation 264 -> 336 (USGS EPQS); cemetery-centre point read 280 ft"}],"kind":"place","map":"sf","lat":37.78417,"lon":-122.44856,"category":"hill","toleranceKm":0.4,"elevationFt":336,"hint":"Point is the hilltop at the former UCSF Laurel Heights campus (3333 California Street), inside the old cemetery grounds. Hills list 264 ft; USGS EPQS 336 ft at the point and 280 ft at the cemetery's center."},{"id":"yerba-buena-island","name":"Yerba Buena Island","tier":4,"explanation":"The natural island in the middle of the Bay Bridge, officially Goat Island from 1895 to 1931 (earlier Sea Bird and Wood Island). The double-deck Yerba Buena Tunnel bores through its center, Coast Guard Sector San Francisco sits on its shore with the vessel-traffic tower on the peak, and a causeway joins it to man-made Treasure Island. It held the first U.S. Naval Training Station on the Pacific coast.","sources":["wiki-yerba-buena-island","usgs-epqs"],"aliases":["Goat Island"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 255246 (island) (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.80991,"lon":-122.366,"category":"hill","toleranceKm":0.4,"elevationFt":343,"hint":"Elevation is USGS EPQS at the Wikipedia island coordinate (343 ft); Wikipedia gives no figure."},{"id":"alta-plaza","name":"Alta Plaza","tier":5,"explanation":"The 12.9-acre terraced park that caps the western edge of Pacific Heights, established in 1888 and named for a nearby spring. Its grand south stairs were used without permission in the 1972 film What's Up, Doc?, and the damage from the car-chase filming is still visible.","sources":["wiki-alta-plaza","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against Wikipedia article coordinate (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article","note":"point moved 30 m NW to park high point; elevation 282 -> 305 (both USGS EPQS)"}],"kind":"place","map":"sf","lat":37.79144,"lon":-122.43801,"category":"hill","toleranceKm":0.4,"elevationFt":305,"hint":"Elevation is USGS EPQS at the park's high point (305 ft); the park center reads 282 ft."},{"id":"stony-hill","name":"Stony Hill","tier":5,"explanation":"A USGS-named summit in Bayview between Silver Terrace and Hunters Point, above India Basin, so obscure that it appears on topographic maps but on almost no list of the city's hills. A good one to know when someone claims to have climbed them all.","sources":["gnis-stony-hill","usgs-epqs"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"coordinate checked against GNIS 1877543 (within 250 m); elevation checked with USGS EPQS at the point plus a 40-300 m grid search for the local summit, and against Wikipedia 'List of hills in San Francisco' and the cited article"}],"kind":"place","map":"sf","lat":37.73437,"lon":-122.3844,"category":"hill","toleranceKm":0.4,"elevationFt":270,"hint":"GNIS summit; USGS EPQS 270 ft."}]},{"id":"sf-history","title":"San Francisco History","subtitle":"From Yelamu villages to the Central Subway","description":"Key dates in the making of San Francisco: Spanish and Mexican beginnings, the Gold Rush, the 1906 earthquake, the bridges, and the movements and landmarks that shaped the modern city.","order":60,"accent":"redwood","sources":[{"id":"wp-timeline-sf","title":"Timeline of San Francisco","url":"https://en.wikipedia.org/wiki/Timeline_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-history-sf","title":"History of San Francisco","url":"https://en.wikipedia.org/wiki/History_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-ohlone","title":"Ohlone","url":"https://en.wikipedia.org/wiki/Ohlone","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"aro-ramaytush","title":"Association of Ramaytush Ohlone","url":"https://www.ramaytush.org/","publisher":"Association of Ramaytush Ohlone","accessed":"2026-11-01","note":"Gives 1,500-2,000 people on the peninsula before Spanish arrival."},{"id":"wp-sf-bay-discovery-site","title":"San Francisco Bay Discovery Site","url":"https://en.wikipedia.org/wiki/San_Francisco_Bay_Discovery_Site","publisher":"Wikipedia","accessed":"2026-11-01","note":"Scouts under Ortega saw the bay Nov 1, 1769; whole party climbed Sweeney Ridge Nov 4."},{"id":"nps-san-mateo-story","title":"Parks for the People: San Mateo Story","url":"https://www.nps.gov/goga/learn/historyculture/parks-for-the-people-san-mateo-story.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Gives November 4, 1769 for the full expedition's climb of Sweeney Ridge."},{"id":"nps-anza-trail","title":"Juan Bautista de Anza National Historic Trail: History & Culture","url":"https://www.nps.gov/juba/learn/historyculture/index.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"240+ colonists; families reached the San Francisco area June 27, 1776."},{"id":"wp-mission-dolores","title":"Mission San Francisco de Asís","url":"https://en.wikipedia.org/wiki/Mission_San_Francisco_de_As%C3%ADs","publisher":"Wikipedia","accessed":"2026-11-01","note":"Gives Oct 9, 1776 as formal founding; founders Palóu and Cambón; adobe church finished 1791."},{"id":"sfmuseum-mission-dolores","title":"Mission Dolores","url":"https://sfmuseum.org/hist5/misdolor.html","publisher":"Museum of the City of San Francisco","accessed":"2026-11-01","note":"First services June 29, 1776 in a tule arbor; treated as the true founding date."},{"id":"wp-presidio-sf","title":"Presidio of San Francisco","url":"https://en.wikipedia.org/wiki/Presidio_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Founded September 17, 1776; transferred to NPS Oct 1, 1994."},{"id":"nps-el-presidio","title":"El Presidio de San Francisco, 1776-1846","url":"https://home.nps.gov/goga/learn/historyculture/el-presidio.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Year 1776 only."},{"id":"nps-presidio-hc","title":"Presidio of San Francisco: History & Culture","url":"https://www.nps.gov/prsf/learn/historyculture/index.htm","publisher":"National Park Service","accessed":"2026-11-01"},{"id":"wp-yerba-buena","title":"Yerba Buena, California","url":"https://en.wikipedia.org/wiki/Yerba_Buena,_California","publisher":"Wikipedia","accessed":"2026-11-01","note":"Says pueblo opened 1834; Richardson's homestead and street plan 1835; flag July 9, 1846; renamed Jan 30, 1847."},{"id":"wp-william-richardson","title":"William A. Richardson","url":"https://en.wikipedia.org/wiki/William_A._Richardson","publisher":"Wikipedia","accessed":"2026-11-01","note":"First dwelling at Yerba Buena, 1835."},{"id":"wp-conquest-california","title":"Conquest of California","url":"https://en.wikipedia.org/wiki/Conquest_of_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"noehill-chl-81","title":"California Historical Landmark 81: Portsmouth Plaza","url":"https://noehill.com/sf/landmarks/cal0081.asp","publisher":"NoeHill (landmark plaque text)","accessed":"2026-11-01"},{"id":"sfmuseum-name-ordinance","title":"Ordinance renaming Yerba Buena to San Francisco, Jan 30, 1847","url":"https://sfmuseum.org/hist/name.html","publisher":"Museum of the City of San Francisco","accessed":"2026-11-01"},{"id":"wp-maria-seise","title":"Maria Seise","url":"https://en.wikipedia.org/wiki/Maria_Seise","publisher":"Wikipedia","accessed":"2026-11-01","note":"Arrived San Francisco 1848 aboard the Eagle; first Chinese woman to immigrate to California."},{"id":"maritimeheritage-chinese","title":"Chinese Immigration to San Francisco","url":"https://www.maritimeheritage.org/news/chs1856.html","publisher":"Maritime Heritage Project","accessed":"2026-11-01","note":"Two men and one woman on the brig Eagle, 1848; year only."},{"id":"wp-chinese-americans-sf","title":"History of Chinese Americans in San Francisco","url":"https://en.wikipedia.org/wiki/History_of_Chinese_Americans_in_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-gold-rush","title":"California Gold Rush","url":"https://en.wikipedia.org/wiki/California_Gold_Rush","publisher":"Wikipedia","accessed":"2026-11-01","note":"Jan 24, 1848; SF ~1,000 in 1848 to 25,000 by 1850; statehood Sept 9, 1850."},{"id":"ohp-chl-530","title":"California Historical Landmark: Gold Discovery Site","url":"https://ohp.parks.ca.gov/ListedResources/Detail/530","publisher":"California Office of Historic Preservation","accessed":"2026-11-01"},{"id":"ca-gov-admission-day","title":"Governor Brown Issues Proclamation Declaring Admission Day (2011)","url":"https://archive.gov.ca.gov/archive/gov39/2011/09/09/news17205/index.html","publisher":"Office of the Governor of California","accessed":"2026-11-01"},{"id":"ebsco-ca-admitted","title":"California Admitted to the Union","url":"https://www.ebsco.com/research-starters/history/california-admitted-union","publisher":"EBSCO Research Starters","accessed":"2026-11-01"},{"id":"wp-vigilance","title":"San Francisco Committee of Vigilance","url":"https://en.wikipedia.org/wiki/San_Francisco_Committee_of_Vigilance","publisher":"Wikipedia","accessed":"2026-11-01","note":"1851 committee formed June 9, 1851; 1856 committee May 1856; four hanged by each."},{"id":"sfmuseum-vigil56","title":"The 1856 Committee of Vigilance","url":"https://sfmuseum.org/hist1/vigil56.html","publisher":"Museum of the City of San Francisco","accessed":"2026-11-01","note":"King shot May 14, died May 20; Casey and Cora hanged May 22, 1856."},{"id":"sfmuseum-vigilantes","title":"The Vigilantes","url":"https://sfmuseum.org/hist11/vigilantes.html","publisher":"Museum of the City of San Francisco","accessed":"2026-11-01"},{"id":"pbs-levi-strauss","title":"They Made America: Levi Strauss","url":"https://www.pbs.org/wgbh/theymadeamerica/whomade/strauss_lo.html","publisher":"PBS","accessed":"2026-11-01","note":"Arrived March 1853; jeans 1873."},{"id":"wp-emperor-norton","title":"Emperor Norton","url":"https://en.wikipedia.org/wiki/Emperor_Norton","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"norton-trust-reign","title":"When Did the Reign of Emperor Norton Really Begin?","url":"https://emperornortontrust.org/blog/2024/10/14/when-did-emperor-nortons-reign-begin","publisher":"The Emperor Norton Trust","accessed":"2026-11-01"},{"id":"wp-mark-twain","title":"Mark Twain","url":"https://en.wikipedia.org/wiki/Mark_Twain","publisher":"Wikipedia","accessed":"2026-11-01","note":"Moved to San Francisco in 1864; Jumping Frog published Nov 18, 1865."},{"id":"mtp-twain-sf","title":"Mark Twain Project: biographical note","url":"https://marktwainproject.org/letters/supplementary/mtdp00201/","publisher":"Mark Twain Project, UC Berkeley","accessed":"2026-11-01","note":"Moved to San Francisco in 1864; wrote for the Morning Call; left for Tuolumne/Calaveras at end of 1864."},{"id":"wp-golden-gate-park","title":"Golden Gate Park","url":"https://en.wikipedia.org/wiki/Golden_Gate_Park","publisher":"Wikipedia","accessed":"2026-11-01","note":"Park act April 4, 1870; 1,017 acres; Hall and McLaren."},{"id":"wp-outside-lands","title":"Outside Lands","url":"https://en.wikipedia.org/wiki/Outside_Lands","publisher":"Wikipedia","accessed":"2026-11-01","note":"Outside Lands Act March 8, 1866; park act April 4, 1870."},{"id":"sfrecpark-ggp","title":"Golden Gate Park","url":"https://sfrecpark.org/770/Golden-Gate-Park","publisher":"San Francisco Recreation and Parks","accessed":"2026-11-01","note":"1,017 acres."},{"id":"wp-clay-street","title":"Clay Street Hill Railroad","url":"https://en.wikipedia.org/wiki/Clay_Street_Hill_Railroad","publisher":"Wikipedia","accessed":"2026-11-01","note":"First run Aug 1 or 2, 1873 (sources differ); public service Sept 1, 1873."},{"id":"sfmta-cable-car-150","title":"150 Years Ago Today: The Cable Car is Born","url":"https://www.sfmta.com/en/node/28633","publisher":"SFMTA","accessed":"2026-11-01","note":"Test run Aug 2, 1873; service Sept 1, 1873."},{"id":"wp-palace-hotel","title":"Palace Hotel, San Francisco","url":"https://en.wikipedia.org/wiki/Palace_Hotel,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Oct 2, 1875; destroyed by fire April 18, 1906; new Palace Dec 19, 1909."},{"id":"pcad-palace-hotel","title":"Palace Hotel #1, San Francisco","url":"https://pcad.lib.washington.edu/building/993","publisher":"Pacific Coast Architecture Database","accessed":"2026-11-01","note":"Opened 10/02/1875."},{"id":"wp-chinese-exclusion","title":"Chinese Exclusion Act","url":"https://en.wikipedia.org/wiki/Chinese_Exclusion_Act","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed May 6, 1882; repealed Dec 17, 1943."},{"id":"archives-chinese-exclusion","title":"Chinese Exclusion Act (1882)","url":"https://www.archives.gov/milestone-documents/chinese-exclusion-act","publisher":"US National Archives","accessed":"2026-11-01"},{"id":"wp-sutro-baths","title":"Sutro Baths","url":"https://en.wikipedia.org/wiki/Sutro_Baths","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened March 14, 1896; burned June 1966."},{"id":"pcad-sutro-baths","title":"Sutro Baths, San Francisco","url":"https://pcad.lib.washington.edu/building/1060","publisher":"Pacific Coast Architecture Database","accessed":"2026-11-01","note":"Opened 03/14/1896; burned 1966."},{"id":"wp-ferry-building","title":"San Francisco Ferry Building","url":"https://en.wikipedia.org/wiki/San_Francisco_Ferry_Building","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened July 13, 1898; architect A. Page Brown; restored 2003."},{"id":"noehill-ferry-building","title":"San Francisco Landmark 90: Ferry Building","url":"https://noehill.com/sf/landmarks/sf090.asp","publisher":"NoeHill","accessed":"2026-11-01","note":"Opened for public use July 13, 1898."},{"id":"wp-1906-quake","title":"1906 San Francisco earthquake","url":"https://en.wikipedia.org/wiki/1906_San_Francisco_earthquake","publisher":"Wikipedia","accessed":"2026-11-01","note":"April 18, 1906, 5:12 a.m.; Mw ~7.9; 3,000+ deaths; >80% of city destroyed."},{"id":"usgs-1906","title":"The Great 1906 San Francisco Earthquake","url":"https://earthquake.usgs.gov/earthquakes/events/1906calif/18april/","publisher":"USGS","accessed":"2026-11-01","note":"April 18, 1906, about 5:12 a.m.; ~296 miles of fault ruptured."},{"id":"wp-cliff-house","title":"Cliff House, San Francisco","url":"https://en.wikipedia.org/wiki/Cliff_House,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"1863 first; 1896 Sutro's Victorian; burned Sept 7, 1907; 1909 third."},{"id":"nps-cliff-house","title":"Cliff House History","url":"https://home.nps.gov/goga/learn/historyculture/cliff-house.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Gives September 1907 for the fire."},{"id":"wp-angel-island","title":"Angel Island Immigration Station","url":"https://en.wikipedia.org/wiki/Angel_Island_Immigration_Station","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Jan 21, 1910; closed Nov 5, 1940."},{"id":"aiisf-history","title":"History of Angel Island Immigration Station","url":"https://www.aiisf.org/history","publisher":"Angel Island Immigration Station Foundation","accessed":"2026-11-01","note":"Opened January 21, 1910; closed October 1940 after August 1940 fire."},{"id":"wp-muni","title":"San Francisco Municipal Railway","url":"https://en.wikipedia.org/wiki/San_Francisco_Municipal_Railway","publisher":"Wikipedia","accessed":"2026-11-01","note":"Began Dec 28, 1912 on Geary."},{"id":"sfmta-history","title":"History of the SFMTA","url":"https://www.sfmta.com/about-us/history-sfmta","publisher":"SFMTA","accessed":"2026-11-01","note":"First Muni streetcar Dec 28, 1912."},{"id":"wp-ppie","title":"Panama-Pacific International Exposition","url":"https://en.wikipedia.org/wiki/Panama%E2%80%93Pacific_International_Exposition","publisher":"Wikipedia","accessed":"2026-11-01","note":"Feb 20 - Dec 4, 1915; 18.9 million visitors."},{"id":"nps-ppie","title":"The Panama-Pacific International Exposition","url":"https://www.nps.gov/goga/learn/historyculture/ppie-theexposition.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Opened Saturday, February 20, 1915."},{"id":"wp-twin-peaks-tunnel","title":"Twin Peaks Tunnel","url":"https://en.wikipedia.org/wiki/Twin_Peaks_Tunnel","publisher":"Wikipedia","accessed":"2026-11-01","note":"Revenue service Feb 3, 1918."},{"id":"sfmta-twin-peaks","title":"SFMTA: Twin Peaks Tunnel and K Ingleside","url":"https://www.sfmta.com/node/16038","publisher":"SFMTA","accessed":"2026-11-01","note":"February 1918 opening."},{"id":"wp-coit-tower","title":"Coit Tower","url":"https://en.wikipedia.org/wiki/Coit_Tower","publisher":"Wikipedia","accessed":"2026-11-01","note":"Completed and dedicated Oct 8, 1933; 210 ft; murals 1934."},{"id":"sfrecpark-coit","title":"Coit Tower","url":"https://sfrecpark.org/facilities/facility/details/Coit-Tower-290","publisher":"San Francisco Recreation and Parks","accessed":"2026-11-01","note":"Completed 1933; murals 1934."},{"id":"wp-alcatraz-pen","title":"Alcatraz Federal Penitentiary","url":"https://en.wikipedia.org/wiki/Alcatraz_Federal_Penitentiary","publisher":"Wikipedia","accessed":"2026-11-01","note":"First 137 prisoners Aug 11, 1934; closed March 21, 1963."},{"id":"bop-alcatraz","title":"Alcatraz","url":"https://www.bop.gov/about/history/alcatraz.jsp","publisher":"Federal Bureau of Prisons","accessed":"2026-11-01","note":"Operated 1934-1963; closed March 21, 1963."},{"id":"nps-alcatraz-pen","title":"Alcatraz: Federal Prison 1934-1963","url":"https://www.nps.gov/alca/learn/historyculture/us-penitentiary-alcatraz.htm","publisher":"National Park Service","accessed":"2026-11-01"},{"id":"wp-1934-strike","title":"1934 West Coast waterfront strike","url":"https://en.wikipedia.org/wiki/1934_West_Coast_waterfront_strike","publisher":"Wikipedia","accessed":"2026-11-01","note":"Strike May 9; Bloody Thursday July 5; general strike July 16-19, 1934."},{"id":"oac-1934-strike","title":"Finding Aid: 1934 ILA and General Strikes of San Francisco","url":"https://oac.cdlib.org/findaid/ark:/13030/tf7d5nb8zx/","publisher":"Bancroft Library / Online Archive of California","accessed":"2026-11-01","note":"May 9 strike; July 5 Bloody Thursday; July 16-19 general strike."},{"id":"wp-hetch-hetchy","title":"Hetch Hetchy","url":"https://en.wikipedia.org/wiki/Hetch_Hetchy","publisher":"Wikipedia","accessed":"2026-11-01","note":"First water celebrated Oct 28, 1934 (infobox says Oct 24)."},{"id":"sfpuc-pulgas","title":"Pulgas Water Temple","url":"https://www.sfpuc.gov/learning/come-visit/pulgas-water-temple","publisher":"San Francisco Public Utilities Commission","accessed":"2026-11-01","note":"Water arrived October 28, 1934 after 160+ miles."},{"id":"wp-bay-bridge","title":"San Francisco-Oakland Bay Bridge","url":"https://en.wikipedia.org/wiki/San_Francisco%E2%80%93Oakland_Bay_Bridge","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Nov 12, 1936; construction began July 9, 1933."},{"id":"asce-bay-bridge","title":"Historic Landmark: San Francisco-Oakland Bay Bridge","url":"https://asce.org/about-civil-engineering/history-and-heritage/historic-landmarks/san-francisco-oakland-bay-bridge","publisher":"American Society of Civil Engineers","accessed":"2026-11-01","note":"Opened November 12, 1936."},{"id":"wp-golden-gate-bridge","title":"Golden Gate Bridge","url":"https://en.wikipedia.org/wiki/Golden_Gate_Bridge","publisher":"Wikipedia","accessed":"2026-11-01","note":"Construction Jan 5, 1933; pedestrians May 27, 1937; vehicles May 28, 1937; 4,200 ft span."},{"id":"wp-ggie","title":"Golden Gate International Exposition","url":"https://en.wikipedia.org/wiki/Golden_Gate_International_Exposition","publisher":"Wikipedia","accessed":"2026-11-01","note":"Feb 18 - Oct 29, 1939; May 25 - Sept 29, 1940."},{"id":"ohp-chl-987","title":"California Historical Landmark: Treasure Island-Golden Gate International Exposition","url":"https://ohp.parks.ca.gov/ListedResources/Detail/987","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Island built 1936-37; fair Feb 18, 1939 to Sept 29, 1940."},{"id":"wp-uncio","title":"United Nations Conference on International Organization","url":"https://en.wikipedia.org/wiki/United_Nations_Conference_on_International_Organization","publisher":"Wikipedia","accessed":"2026-11-01","note":"April 25 - June 26, 1945; plenaries at the Opera House; Charter signed at the Veterans Building."},{"id":"un-sf-conference","title":"The San Francisco Conference","url":"https://www.un.org/en/about-us/history-of-the-un/san-francisco-conference","publisher":"United Nations","accessed":"2026-11-01","note":"Charter adopted June 25 at the Opera House and signed June 26 at the Herbst Theatre, Veterans Building."},{"id":"wp-six-gallery","title":"Six Gallery reading","url":"https://en.wikipedia.org/wiki/Six_Gallery_reading","publisher":"Wikipedia","accessed":"2026-11-01","note":"Friday Oct 7, 1955; 3119 Fillmore."},{"id":"pw-six-gallery","title":"Poets & Writers: the Six Gallery reading","url":"https://www.pw.org/node/496512","publisher":"Poets & Writers","accessed":"2026-11-01","note":"October 7, 1955."},{"id":"wp-sf-giants","title":"San Francisco Giants","url":"https://en.wikipedia.org/wiki/San_Francisco_Giants","publisher":"Wikipedia","accessed":"2026-11-01","note":"First SF game April 15, 1958 at Seals Stadium, 8-0 over the Dodgers."},{"id":"bbref-1958-04-15","title":"Box score: Dodgers at Giants, April 15, 1958","url":"https://www.baseball-reference.com/boxes/SFN/SFN195804150.shtml","publisher":"Baseball-Reference","accessed":"2026-11-01","note":"Giants 8, Dodgers 0; attendance 23,448."},{"id":"wp-candlestick","title":"Candlestick Park","url":"https://en.wikipedia.org/wiki/Candlestick_Park","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened April 12, 1960; Giants through 1999; 49ers 1971-2013."},{"id":"ballparks-candlestick","title":"Candlestick Park","url":"https://www.ballparksofbaseball.com/ballparks/candlestick-park/","publisher":"Ballparks of Baseball","accessed":"2026-11-01","note":"Opened April 12, 1960 vs. Cardinals."},{"id":"wp-comptons","title":"Compton's Cafeteria riot","url":"https://en.wikipedia.org/wiki/Compton%27s_Cafeteria_riot","publisher":"Wikipedia","accessed":"2026-11-01","note":"August 1966; exact day unknown; 101 Taylor at Turk."},{"id":"kqed-comptons","title":"In '66, on One Hot August Night, Trans Women Fought for Their Rights","url":"https://www.kqed.org/arts/11838357/in-66-on-one-hot-august-night-trans-women-fought-for-their-rights","publisher":"KQED","accessed":"2026-11-01","note":"August 1966; exact date lost."},{"id":"wp-summer-of-love","title":"Summer of Love","url":"https://en.wikipedia.org/wiki/Summer_of_Love","publisher":"Wikipedia","accessed":"2026-11-01","note":"Summer 1967; ~100,000 people; Human Be-In Jan 14, 1967; Death of Hippie Oct 6, 1967."},{"id":"wp-alcatraz-occupation","title":"Occupation of Alcatraz","url":"https://en.wikipedia.org/wiki/Occupation_of_Alcatraz","publisher":"Wikipedia","accessed":"2026-11-01","note":"Nov 20, 1969 to June 11, 1971."},{"id":"nps-we-hold-the-rock","title":"We Hold the Rock","url":"https://www.nps.gov/alca/learn/historyculture/we-hold-the-rock.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Began November 20, 1969; ended June 11, 1971."},{"id":"wp-bart","title":"Bay Area Rapid Transit","url":"https://en.wikipedia.org/wiki/Bay_Area_Rapid_Transit","publisher":"Wikipedia","accessed":"2026-11-01","note":"First passenger service Sept 11, 1972; San Francisco service Nov 5, 1973; Transbay Tube Sept 16, 1974."},{"id":"bart-history","title":"A History of BART","url":"https://www.bart.gov/about/history","publisher":"BART","accessed":"2026-11-01","note":"District formed 1957; bond approved November 1962. Opening date corroborated by BART's 40th-anniversary fact sheet (PDF; text extraction partial)."},{"id":"wp-transamerica","title":"Transamerica Pyramid","url":"https://en.wikipedia.org/wiki/Transamerica_Pyramid","publisher":"Wikipedia","accessed":"2026-11-01","note":"Built 1969-1972; 853 ft; William Pereira."},{"id":"pcad-transamerica","title":"Transamerica Pyramid, San Francisco","url":"https://pcad.lib.washington.edu/building/2499","publisher":"Pacific Coast Architecture Database","accessed":"2026-11-01","note":"Completed 1972; 260 m / 853 ft; Pereira."},{"id":"wp-harvey-milk","title":"Harvey Milk","url":"https://en.wikipedia.org/wiki/Harvey_Milk","publisher":"Wikipedia","accessed":"2026-11-01","note":"Elected Nov 8, 1977; term began Jan 8, 1978; assassinated Nov 27, 1978; White Night May 21, 1979."},{"id":"milk-foundation-bio","title":"Harvey Milk Biography","url":"https://milkfoundation.org/about/harvey-milk-biography/","publisher":"Harvey Milk Foundation","accessed":"2026-11-01","note":"Won supervisor seat 1977; sworn in Jan 9, 1978; killed Nov 27, 1978."},{"id":"history-white-night","title":"What Were the White Night Riots?","url":"https://www.history.com/articles/what-were-the-white-night-riots","publisher":"HISTORY","accessed":"2026-11-01","note":"May 21, 1979; a dozen police cars destroyed."},{"id":"wp-hiv-timeline","title":"Timeline of HIV/AIDS","url":"https://en.wikipedia.org/wiki/Timeline_of_HIV/AIDS","publisher":"Wikipedia","accessed":"2026-11-01","note":"CDC report June 5, 1981."},{"id":"cdc-mmwr-1981","title":"MMWR, June 5, 1981: Pneumocystis Pneumonia - Los Angeles","url":"https://www.cdc.gov/mmwr/preview/mmwrhtml/june_5.htm","publisher":"CDC","accessed":"2026-11-01","note":"The original report of five cases."},{"id":"ucsf-aids-40","title":"AIDS at 40: Forty Years of One Pandemic and Then Another","url":"https://www.ucsf.edu/news/2021/06/420736/aids-40-forty-years-one-pandemic-and-then-another","publisher":"UCSF","accessed":"2026-11-01","note":"Ward 86 opened January 1, 1983; world's first dedicated AIDS clinic."},{"id":"oac-ward-86","title":"San Francisco General Hospital, Ward 84/86 Records, 1981-1991","url":"https://oac.cdlib.org/findaid/ark:/13030/kt100025hr","publisher":"UCSF Archives / Online Archive of California","accessed":"2026-11-01","note":"Clinic opened on Ward 86 in January 1983; Ward 5B inpatient unit June 1983."},{"id":"wp-loma-prieta","title":"1989 Loma Prieta earthquake","url":"https://en.wikipedia.org/wiki/1989_Loma_Prieta_earthquake","publisher":"Wikipedia","accessed":"2026-11-01","note":"Oct 17, 1989, 5:04 p.m.; Mw 6.9; 63 deaths."},{"id":"usgs-loma-prieta","title":"M6.9 October 17, 1989 Loma Prieta Earthquake","url":"https://www.usgs.gov/programs/earthquake-hazards/science/m69-october-17-1989-loma-prieta-earthquake","publisher":"USGS","accessed":"2026-11-01","note":"5:04 PM PDT; M6.9; 63 deaths."},{"id":"wp-embarcadero-freeway","title":"Embarcadero Freeway","url":"https://en.wikipedia.org/wiki/Embarcadero_Freeway","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Feb 5, 1959; demolition began Feb 27, 1991."},{"id":"fhwa-feb-27","title":"Highway History: This Day in History, February 27","url":"https://www.fhwa.dot.gov/byday/fhbd0227.htm","publisher":"Federal Highway Administration","accessed":"2026-11-01","note":"Demolition began Feb 27, 1991."},{"id":"wp-oracle-park","title":"Oracle Park","url":"https://en.wikipedia.org/wiki/Oracle_Park","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened as Pacific Bell Park March 31, 2000 (exhibition); first regular-season game April 11, 2000."},{"id":"bbref-2000-04-11","title":"Box score: Dodgers at Giants, April 11, 2000","url":"https://www.baseball-reference.com/boxes/SFN/SFN200004110.shtml","publisher":"Baseball-Reference","accessed":"2026-11-01","note":"Dodgers 6, Giants 5; attendance 40,930."},{"id":"wp-dot-com","title":"Dot-com bubble","url":"https://en.wikipedia.org/wiki/Dot-com_bubble","publisher":"Wikipedia","accessed":"2026-11-01","note":"NASDAQ peaked March 10, 2000 at 5,048.62."},{"id":"intlbanker-dotcom","title":"The Dotcom Bubble Burst (2000)","url":"https://internationalbanker.com/history-of-financial-crises/the-dotcom-bubble-burst-2000/","publisher":"International Banker","accessed":"2026-11-01","note":"Peak 5,048.62 on March 10, 2000; fell >75% by Oct 2002."},{"id":"wp-central-freeway","title":"Central Freeway","url":"https://en.wikipedia.org/wiki/Central_Freeway","publisher":"Wikipedia","accessed":"2026-11-01","note":"Lower deck removed 2003; Octavia Boulevard opened Sept 9, 2005."},{"id":"wp-octavia-blvd","title":"Octavia Boulevard","url":"https://en.wikipedia.org/wiki/Octavia_Boulevard","publisher":"Wikipedia","accessed":"2026-11-01","note":"Props E (1998) and I (1999); elevated freeway north of Market demolished 2003."},{"id":"socketsite-octavia","title":"Octavia Boulevard opens (Sept 2005)","url":"https://socketsite.com/archives/2005/09/octavia_bouleva_1.html","publisher":"SocketSite","accessed":"2026-11-01","note":"Ribbon-cutting Friday Sept 9, 2005."},{"id":"wp-salesforce-tower","title":"Salesforce Tower","url":"https://en.wikipedia.org/wiki/Salesforce_Tower","publisher":"Wikipedia","accessed":"2026-11-01","note":"1,070 ft; opened Jan 8, 2018."},{"id":"cnbc-salesforce-topout","title":"Salesforce Tower, San Francisco's tallest building, tops out","url":"https://www.cnbc.com/2017/04/06/salesforce-tower-san-franciscos-tallest-building-views.html","publisher":"CNBC","accessed":"2026-11-01","note":"Topped out April 6, 2017."},{"id":"wp-central-subway","title":"Central Subway (San Francisco)","url":"https://en.wikipedia.org/wiki/Central_Subway_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Weekend service Nov 19, 2022; full service Jan 7, 2023."},{"id":"sfmta-central-subway","title":"Central Subway Project","url":"https://www.sfmta.com/projects/central-subway-project","publisher":"SFMTA","accessed":"2026-11-01","note":"Nov 19, 2022 weekend service; Jan 7, 2023 full service."},{"id":"wp-chase-center","title":"Chase Center","url":"https://en.wikipedia.org/wiki/Chase_Center","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Sept 6, 2019; first Warriors regular-season game Oct 24, 2019."},{"id":"kqed-chase-center","title":"Metallica and SF Symphony Open Chase Center With a Bang","url":"https://www.kqed.org/arts/13865920/metallica-and-sf-symphony-open-chase-center-with-a-bang","publisher":"KQED","accessed":"2026-11-01","note":"Opening concert Friday Sept 6, 2019."},{"id":"wp-sunset-district","title":"Sunset District, San Francisco","url":"https://en.wikipedia.org/wiki/Sunset_District,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Known as the Outside Lands; dunes built over mainly 1906-1950s."},{"id":"secretsf-dunes","title":"San Francisco's Sand Dunes History","url":"https://secretsanfrancisco.com/san-francisco-sand-dunes-history/","publisher":"Secret San Francisco","accessed":"2026-11-01","note":"Richmond and Sunset called the Outside Lands."},{"id":"ohp-chl-394","title":"Site of the Discovery of San Francisco Bay (CHL 394)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/394","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Scouts reported the bay Oct 31, 1769; expedition advanced Nov 4."},{"id":"ohp-chl-79","title":"Presidio of San Francisco (CHL 79)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/79","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Formally established September 17, 1776."},{"id":"ohp-chl-81","title":"Landing Place of Captain J. B. Montgomery (CHL 81)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/81","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"July 9, 1846 landing from USS Portsmouth."},{"id":"ohp-chl-500","title":"Eastern Terminus of Clay Street Hill Railroad (CHL 500)","url":"https://ohp.parks.ca.gov/ListedResources/Detail/500","publisher":"California Office of Historic Preservation","accessed":"2026-11-01","note":"Says operation started August 1, 1873 (SFMTA says test run Aug 2)."},{"id":"wp-yelamu","title":"Yelamu","url":"https://en.wikipedia.org/wiki/Yelamu","publisher":"Wikipedia","accessed":"2026-11-01","note":"Ramaytush-speaking; villages in Visitacion Valley, along Mission Creek and near Crissy Field."},{"id":"wp-anza","title":"Juan Bautista de Anza","url":"https://en.wikipedia.org/wiki/Juan_Bautista_de_Anza","publisher":"Wikipedia","accessed":"2026-11-01","note":"Anza selected the sites in March 1776; the settlement was established by José Joaquín Moraga."},{"id":"missiondolores-org","title":"Mission Dolores (official site)","url":"https://www.missiondolores.org/","publisher":"Mission Dolores Parish","accessed":"2026-11-01","note":"Founded June 29, 1776; oldest intact building in San Francisco."},{"id":"wp-san-francisco","title":"San Francisco","url":"https://en.wikipedia.org/wiki/San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"1835 land grant to Richardson; flag raised July 9, 1846; renamed by Bartlett 1847."},{"id":"wp-sloat","title":"John D. Sloat","url":"https://en.wikipedia.org/wiki/John_D._Sloat","publisher":"Wikipedia","accessed":"2026-11-01","note":"Military governor from July 7, 1846 (Monterey)."},{"id":"wp-admission-day","title":"California Admission Day","url":"https://en.wikipedia.org/wiki/California_Admission_Day","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed by Fillmore Sept 9, 1850; free state; no organized territory first."},{"id":"wp-brannan","title":"Samuel Brannan","url":"https://en.wikipedia.org/wiki/Samuel_Brannan","publisher":"Wikipedia","accessed":"2026-11-01","note":"First to publicize the Gold Rush; helped form the 1851 vigilance committee."},{"id":"wp-sydney-ducks","title":"Sydney Ducks","url":"https://en.wikipedia.org/wiki/Sydney_Ducks","publisher":"Wikipedia","accessed":"2026-11-01","note":"Catalyst for the first Committee of Vigilance of 1851."},{"id":"wp-james-king","title":"James King of William","url":"https://en.wikipedia.org/wiki/James_King_of_William","publisher":"Wikipedia","accessed":"2026-11-01","note":"Shot May 14, 1856; Casey and Cora hanged May 22, 1856."},{"id":"sfmuseum-norton","title":"Emperor Norton chronology","url":"https://sfmuseum.org/hist1/norton.html","publisher":"Museum of the City of San Francisco","accessed":"2026-11-01","note":"Proclamation Sept 17, 1859; died Jan 8, 1880; 10,000 at funeral."},{"id":"wp-jumping-frog","title":"The Celebrated Jumping Frog of Calaveras County","url":"https://en.wikipedia.org/wiki/The_Celebrated_Jumping_Frog_of_Calaveras_County","publisher":"Wikipedia","accessed":"2026-11-01","note":"Published Nov 18, 1865 in the Saturday Press."},{"id":"wp-mclaren","title":"John McLaren (horticulturist)","url":"https://en.wikipedia.org/wiki/John_McLaren_(horticulturist)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Golden Gate Park superintendent 1890-1943."},{"id":"wp-ralston","title":"William Chapman Ralston","url":"https://en.wikipedia.org/wiki/William_Chapman_Ralston","publisher":"Wikipedia","accessed":"2026-11-01","note":"Died August 27, 1875."},{"id":"sfpalace-history","title":"The Palace Hotel: History","url":"https://www.sfpalace.com/history","publisher":"Palace Hotel","accessed":"2026-11-01","note":"First opened 1875; reopened 1909."},{"id":"nps-sutro-baths","title":"Sutro Baths History","url":"https://www.nps.gov/goga/learn/historyculture/sutro-baths.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"Seven pools; demolition began 1964; fire 1966."},{"id":"wp-page-brown","title":"A. Page Brown","url":"https://en.wikipedia.org/wiki/A._Page_Brown","publisher":"Wikipedia","accessed":"2026-11-01","note":"Ferry Building opened 1898."},{"id":"nps-prsf-1906","title":"1906 Earthquake and the Army","url":"https://www.nps.gov/prsf/learn/historyculture/1906-earthquake.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"5:12 a.m. April 18, 1906; fires burned three days."},{"id":"usgs-1906-casualties","title":"Casualties and damage after the 1906 Earthquake","url":"https://earthquake.usgs.gov/earthquakes/events/1906calif/18april/casualties.php","publisher":"USGS","accessed":"2026-11-01","note":"More than 3,000 dead."},{"id":"parks-angel-island","title":"Angel Island State Park","url":"https://www.parks.ca.gov/?page_id=1309","publisher":"California State Parks","accessed":"2026-11-01","note":"Station opened 1910."},{"id":"wp-b-geary","title":"B Geary","url":"https://en.wikipedia.org/wiki/B_Geary","publisher":"Wikipedia","accessed":"2026-11-01","note":"Muni acquired Geary as its first streetcar line, opening 1912."},{"id":"wp-palace-fine-arts","title":"Palace of Fine Arts","url":"https://en.wikipedia.org/wiki/Palace_of_Fine_Arts","publisher":"Wikipedia","accessed":"2026-11-01","note":"Only PPIE structure surviving on site; rebuilt 1964-74."},{"id":"wp-lillie-coit","title":"Lillie Hitchcock Coit","url":"https://en.wikipedia.org/wiki/Lillie_Hitchcock_Coit","publisher":"Wikipedia","accessed":"2026-11-01","note":"Left one-third of her estate to beautify the city."},{"id":"ilwu-story","title":"The ILWU Story","url":"https://www.ilwu.org/history/the-ilwu-story/","publisher":"ILWU","accessed":"2026-11-01","note":"Bloody Thursday July 5, 1934: two workers killed; union hiring hall demand."},{"id":"wp-harry-bridges","title":"Harry Bridges","url":"https://en.wikipedia.org/wiki/Harry_Bridges","publisher":"Wikipedia","accessed":"2026-11-01","note":"Four-day San Francisco general strike after Bloody Thursday."},{"id":"wp-alcatraz-island","title":"Alcatraz Island","url":"https://en.wikipedia.org/wiki/Alcatraz_Island","publisher":"Wikipedia","accessed":"2026-11-01","note":"First 137 prisoners Aug 11, 1934; closed March 21, 1963."},{"id":"wp-pulgas","title":"Pulgas Water Temple","url":"https://en.wikipedia.org/wiki/Pulgas_Water_Temple","publisher":"Wikipedia","accessed":"2026-11-01","note":"Commemorates 1934 completion; ~160 miles."},{"id":"wp-purcell","title":"Charles H. Purcell","url":"https://en.wikipedia.org/wiki/Charles_H._Purcell","publisher":"Wikipedia","accessed":"2026-11-01","note":"Bay Bridge was the longest and most expensive bridge ever built at completion."},{"id":"history-ggb","title":"Golden Gate Bridge opens (This Day in History)","url":"https://www.history.com/this-day-in-history/may-27/golden-gate-bridge-opens","publisher":"History.com","accessed":"2026-11-01","note":"Pedestrian Day May 27, 1937, ~200,000 walkers; vehicles May 28."},{"id":"wp-verrazzano","title":"Verrazzano-Narrows Bridge","url":"https://en.wikipedia.org/wiki/Verrazzano-Narrows_Bridge","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Nov 21, 1964 with a 4,260 ft span."},{"id":"wp-treasure-island","title":"Treasure Island, San Francisco","url":"https://en.wikipedia.org/wiki/Treasure_Island,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Built 1936-37; fair opened Feb 18, 1939; 393 acres."},{"id":"wp-un-charter","title":"Charter of the United Nations","url":"https://en.wikipedia.org/wiki/Charter_of_the_United_Nations","publisher":"Wikipedia","accessed":"2026-11-01","note":"Signed 26 June 1945 in San Francisco by 50 countries."},{"id":"wp-howl","title":"Howl (poem)","url":"https://en.wikipedia.org/wiki/Howl_(poem)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Performed at the Six Gallery Oct 1955; 1957 obscenity trial."},{"id":"wp-seals-stadium","title":"Seals Stadium","url":"https://en.wikipedia.org/wiki/Seals_Stadium","publisher":"Wikipedia","accessed":"2026-11-01","note":"April 15, 1958: first West Coast major league game, Giants 8-0."},{"id":"wp-beatles-1966","title":"The Beatles' 1966 US tour","url":"https://en.wikipedia.org/wiki/The_Beatles%27_1966_US_tour","publisher":"Wikipedia","accessed":"2026-11-01","note":"Final paid concert 29 August 1966 at Candlestick Park."},{"id":"wp-human-be-in","title":"Human Be-In","url":"https://en.wikipedia.org/wiki/Human_Be-In","publisher":"Wikipedia","accessed":"2026-11-01","note":"January 14, 1967, Golden Gate Park."},{"id":"wp-haight-ashbury","title":"Haight-Ashbury","url":"https://en.wikipedia.org/wiki/Haight-Ashbury","publisher":"Wikipedia","accessed":"2026-11-01","note":"Death of the Hippie mock funeral Oct 6, 1967."},{"id":"wp-macarthur-bart","title":"MacArthur station (BART)","url":"https://en.wikipedia.org/wiki/MacArthur_station_(BART)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened September 11, 1972."},{"id":"wp-market-street-subway","title":"Market Street subway","url":"https://en.wikipedia.org/wiki/Market_Street_subway","publisher":"Wikipedia","accessed":"2026-11-01","note":"BART opened Nov 5, 1973; Muni Metro Feb 18, 1980."},{"id":"wp-transbay-tube","title":"Transbay Tube","url":"https://en.wikipedia.org/wiki/Transbay_Tube","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened September 16, 1974."},{"id":"wp-tallest-sf","title":"List of tallest buildings in San Francisco","url":"https://en.wikipedia.org/wiki/List_of_tallest_buildings_in_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Transamerica Pyramid 1972, 853 ft; Salesforce Tower 1,070 ft."},{"id":"wp-wilshire-grand","title":"Wilshire Grand Center","url":"https://en.wikipedia.org/wiki/Wilshire_Grand_Center","publisher":"Wikipedia","accessed":"2026-11-01","note":"1,100 ft; tallest in California since 2017."},{"id":"wp-1977-sup-election","title":"1977 San Francisco Board of Supervisors election","url":"https://en.wikipedia.org/wiki/1977_San_Francisco_Board_of_Supervisors_election","publisher":"Wikipedia","accessed":"2026-11-01","note":"Held November 8, 1977; first district-based board election."},{"id":"wp-moscone-milk","title":"Moscone-Milk assassinations","url":"https://en.wikipedia.org/wiki/Moscone%E2%80%93Milk_assassinations","publisher":"Wikipedia","accessed":"2026-11-01","note":"Nov 27, 1978; White entered via a basement window; Feinstein announced the deaths."},{"id":"wp-white-night","title":"White Night riots","url":"https://en.wikipedia.org/wiki/White_Night_riots","publisher":"Wikipedia","accessed":"2026-11-01","note":"May 21, 1979; a dozen police cars destroyed; retaliatory raid on a Castro bar."},{"id":"hiv-gov-timeline","title":"A Timeline of HIV and AIDS","url":"https://www.hiv.gov/hiv-basics/overview/history/hiv-and-aids-timeline","publisher":"HIV.gov","accessed":"2026-11-01","note":"June 5, 1981 MMWR: five young gay men in Los Angeles with PCP."},{"id":"wp-1989-ws","title":"1989 World Series","url":"https://en.wikipedia.org/wiki/1989_World_Series","publisher":"Wikipedia","accessed":"2026-11-01","note":"Quake struck at 5:04 p.m. before Game 3 on Oct 17."},{"id":"wp-nasdaq","title":"Nasdaq Composite","url":"https://en.wikipedia.org/wiki/Nasdaq_Composite","publisher":"Wikipedia","accessed":"2026-11-01","note":"Peaked March 10, 2000; fell 78% by October 2002."},{"id":"wp-2000-giants","title":"2000 San Francisco Giants season","url":"https://en.wikipedia.org/wiki/2000_San_Francisco_Giants_season","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opening series April 11-13, 2000 vs. Dodgers."},{"id":"wp-warriors","title":"Golden State Warriors","url":"https://en.wikipedia.org/wiki/Golden_State_Warriors","publisher":"Wikipedia","accessed":"2026-11-01","note":"1970-71 was the last season as the San Francisco Warriors; Oakland Coliseum Arena home thereafter."},{"id":"wp-chinatown-station","title":"Chinatown-Rose Pak station","url":"https://en.wikipedia.org/wiki/Chinatown%E2%80%93Rose_Pak_station","publisher":"Wikipedia","accessed":"2026-11-01","note":"Opened Nov 19, 2022 (weekend shuttle); regular T service Jan 7, 2023."},{"id":"wp-richmond-district","title":"Richmond District, San Francisco","url":"https://en.wikipedia.org/wiki/Richmond_District,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01","note":"Originally sand dunes called Outside Lands."},{"id":"google-patent-139121","title":"US Patent 139,121: Improvement in fastening pocket-openings","url":"https://patents.google.com/patent/US139121A/en","publisher":"Google Patents","accessed":"2026-11-01","note":"Granted May 20, 1873 to Jacob W. Davis, assignor to himself and Levi Strauss & Co."},{"id":"wp-jacob-davis","title":"Jacob W. Davis","url":"https://en.wikipedia.org/wiki/Jacob_W._Davis","publisher":"Wikipedia","accessed":"2026-11-01","note":"Reno tailor who riveted work pants and partnered with Levi Strauss."}],"items":[{"id":"hist-yelamu-ohlone","name":"Yelamu","tier":3,"explanation":"The Yelamu were Ramaytush-speaking Ohlone with villages along Mission Creek, near the Presidio and in Visitacion Valley. Their descendants' association estimates 1,500 to 2,000 people lived on the peninsula before colonization, and only a few families survived the mission era.","sources":["wp-ohlone","aro-ramaytush","wp-yelamu"],"tags":["indigenous"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Checked Wikipedia \"Yelamu\" (Ramaytush speakers; villages in Visitacion Valley, on Mission Creek, near Crissy Field) and ramaytush.org (1,500-2,000 people; few families survived). Distractors are East Bay, Santa Clara Valley and Marin groups."}],"kind":"fact","question":"Which Ohlone group lived on the San Francisco peninsula when the Spanish arrived in 1776?","distractors":["Chochenyo","Tamien","Coast Miwok"]},{"id":"hist-portola-sights-bay","name":"Portolá expedition sights San Francisco Bay","tier":2,"explanation":"Spanish ships had sailed past the fog-hidden Golden Gate for two centuries; it took an overland party looking for Monterey to stumble on the bay. Ortega's scouts glimpsed it around November 1, and on November 4 the whole expedition climbed Sweeney Ridge above today's Pacifica for the first European view.","sources":["wp-sf-bay-discovery-site","nps-san-mateo-story","wp-history-sf","ohp-chl-394"],"tags":["spanish"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Date checked against CHL 394 (scouts reported the bay from camp Oct 31; expedition advanced Nov 4, 1769) and NPS."}],"kind":"event","year":1769,"month":11,"day":4},{"id":"hist-anza-colonists-arrive","name":"Anza expedition's colonists reach San Francisco","tier":3,"explanation":"Juan Bautista de Anza recruited some 240 settlers, soldiers and children and led them overland from Sonora; after he turned back at Monterey, Lieutenant José Joaquín Moraga brought the families to the bay on June 27, 1776, a week before the Declaration of Independence was adopted on the other coast.","sources":["nps-anza-trail","wp-history-sf","wp-anza"],"tags":["spanish"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"NPS Anza Trail: 240+ colonists; families arrived June 27, 1776. Wikipedia Anza: settlement established by Moraga. Reworded: Moraga led the final leg and the Declaration was adopted (not signed) a week later."}],"kind":"event","year":1776,"month":6,"day":27},{"id":"hist-mission-dolores-founded","name":"Mission Dolores founded","tier":1,"explanation":"Father Francisco Palóu said the first Mass under a brush shelter on June 29, 1776, the date the city celebrates as its birthday; the formal dedication followed on October 9. The whitewashed adobe church finished in 1791 still stands on Dolores Street.","sources":["sfmuseum-mission-dolores","wp-mission-dolores","missiondolores-org"],"tags":["spanish","mission"],"aliases":["Mission San Francisco de Asís"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"missiondolores.org and California Missions Foundation give June 29, 1776; Wikipedia gives Oct 9, 1776 dedication and 1791 adobe church. Removed unsupported \"near Mission and 16th Streets\" placement."}],"kind":"event","year":1776,"month":6,"day":29},{"id":"hist-presidio-founded","name":"Presidio of San Francisco founded","tier":2,"explanation":"Spain planted a military post at the Golden Gate on September 17, 1776 to guard its northernmost outpost. The site stayed an army base under three flags, Spain, Mexico and the US, until it joined the Golden Gate National Recreation Area in 1994.","sources":["wp-presidio-sf","nps-el-presidio","nps-presidio-hc","ohp-chl-79"],"tags":["spanish","military"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CHL 79: formally established September 17, 1776. NPS: part of GGNRA since 1994."}],"kind":"event","year":1776,"month":9,"day":17},{"id":"hist-yerba-buena-founded","name":"William Richardson settles Yerba Buena","tier":2,"explanation":"The English-born harbormaster pitched the first dwelling of the trading village of Yerba Buena on a cove near today's Portsmouth Square and helped lay out its first street. That hamlet, not Mission Dolores or the Presidio, grew into downtown San Francisco.","sources":["wp-william-richardson","wp-yerba-buena","wp-history-sf","wp-san-francisco"],"tags":["mexican"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia \"San Francisco\": 1835 first Yerba Buena land grant to William Richardson; Richardson article: first dwelling 1835. Year-only item."}],"kind":"event","year":1835},{"id":"hist-us-flag-raised","name":"US flag raised over Yerba Buena","tier":2,"explanation":"Two days after Commodore Sloat claimed California at Monterey, Captain John Montgomery of the sloop USS Portsmouth marched ashore and raised the Stars and Stripes on the village plaza. The plaza was renamed Portsmouth Square after his ship.","sources":["wp-conquest-california","noehill-chl-81","wp-yerba-buena","ohp-chl-81","wp-sloat"],"tags":["mexican-american-war"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CHL 81 (OHP): Montgomery landed from USS Portsmouth July 9, 1846. Wikipedia Sloat: governor from July 7, 1846. Wikipedia San Francisco: plaza renamed Portsmouth Square."}],"kind":"event","year":1846,"month":7,"day":9},{"id":"hist-renamed-san-francisco","name":"Yerba Buena renamed San Francisco","tier":2,"explanation":"Alcalde Washington Bartlett ordered that the town be called San Francisco in all official records, matching the bay's name on the maps. The name tied the growing port to the famous bay rather than to the mint plant it had been named for.","sources":["sfmuseum-name-ordinance","wp-yerba-buena","wp-san-francisco"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"sfmuseum ordinance text dated January 30, 1847 by Washington Bartlett; Wikipedia San Francisco confirms 1847 renaming."}],"kind":"event","year":1847,"month":1,"day":30},{"id":"hist-first-chinese-arrive","name":"First recorded Chinese immigrants reach San Francisco","tier":4,"explanation":"Records point to two men and a woman, Maria Seise, arriving on the brig Eagle in 1848, months before the Gold Rush. Within a few years thousands followed from Guangdong, seeding the Chinatown that still anchors the city.","sources":["wp-maria-seise","maritimeheritage-chinese","wp-chinese-americans-sf"],"tags":["chinese-american","immigration"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Re-opened both cited sources: maritimeheritage.org (two men and one woman on the brig Eagle, 1848) and Wikipedia Maria Seise (arrived 1848 aboard the Eagle). No further independent source found; year-only item."}],"kind":"event","year":1848},{"id":"hist-gold-discovered","name":"Gold discovered at Sutter's Mill","tier":1,"explanation":"James Marshall spotted flakes in the tailrace of John Sutter's sawmill at Coloma on the American River. When merchant Sam Brannan publicized the find in San Francisco that spring, the sleepy port emptied out for the diggings, then exploded.","sources":["wp-gold-rush","ohp-chl-530","wp-brannan"],"tags":["gold-rush"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Marshall Gold Discovery SHP (parks.ca.gov): Marshall found gold in 1848 at Coloma on the South Fork American River; CHL 530 and Wikipedia give Jan 24, 1848. Brannan claim softened to what Wikipedia supports (first to publicize the rush)."}],"kind":"event","year":1848,"month":1,"day":24},{"id":"hist-gold-rush-boom","name":"Forty-Niners flood into San Francisco","tier":1,"explanation":"The town grew from roughly 1,000 residents at the start of 1848 to about 25,000 by the end of 1849 as ships from around the world crowded the cove. Tents and shanties climbed the hills, and the waterfront cove was soon being filled in to make room.","sources":["wp-gold-rush","wp-history-sf"],"tags":["gold-rush"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia History of San Francisco: population rose from 1,000 (Jan 1848) to 25,000 (Dec 1849); Wikipedia Gold Rush: ~1,000 in 1848 to 25,000 by 1850."}],"kind":"event","year":1849},{"id":"hist-california-statehood","name":"California admitted as the 31st state","tier":2,"explanation":"President Fillmore signed the admission bill on September 9, 1850 as part of the Compromise of 1850, bringing California in as a free state. California never went through territorial status, jumping from military rule to statehood in two years.","sources":["ca-gov-admission-day","ebsco-ca-admitted","wp-gold-rush","wp-admission-day"],"tags":["statehood"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia California Admission Day: signed by Fillmore Sept 9, 1850, free state under the Compromise of 1850. Could not source the \"steamer Oregon\" sentence; replaced with the sourced no-territory fact."}],"kind":"event","year":1850,"month":9,"day":9},{"id":"hist-vigilance-1851","name":"First Committee of Vigilance formed","tier":3,"explanation":"Fed up with arson, robbery and weak courts, merchants organized a vigilance committee in June 1851 that tried suspects itself and hanged four men. It set a precedent the city would repeat five years later.","sources":["wp-vigilance","sfmuseum-vigilantes","wp-sydney-ducks"],"tags":["gold-rush"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Sydney Ducks confirms the 1851 Committee of Vigilance; June 1851 formation and four hangings from the cited Wikipedia and sfmuseum pages. Month-level date retained."}],"kind":"event","year":1851,"month":6},{"id":"hist-vigilance-1856","name":"Second Committee of Vigilance seizes the city","tier":3,"explanation":"After James Casey shot crusading editor James King of William on May 14, 1856, thousands joined a vigilance committee headquartered at Fort Gunnybags on Sacramento Street. It hanged Casey and Charles Cora on May 22 and ran the city for months.","sources":["wp-vigilance","sfmuseum-vigil56","sfmuseum-vigilantes","wp-james-king"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia James King of William: shot May 14, 1856; Casey hanged May 22, 1856 with Cora; thousands joined. Fort Gunnybags from cited sfmuseum pages."}],"kind":"event","year":1856,"month":5},{"id":"hist-riveted-jeans-patent","name":"Levi Strauss and Jacob Davis patent riveted work pants","tier":3,"explanation":"Reno tailor Jacob Davis had been strengthening miners' trousers with copper rivets and asked his San Francisco fabric supplier, dry-goods merchant Levi Strauss, to back a patent. US Patent 139,121 was granted on May 20, 1873, the date the company counts as the birthday of blue jeans.","sources":["google-patent-139121","wp-jacob-davis","pbs-levi-strauss"],"tags":["business"],"verification":[{"by":"verifier:history-check","date":"2026-11-01","method":"Replacement for the removed \"Levi Strauss arrives\" item (arrival year contested: company says 1853, Wikipedia says 1854). Patent date checked on Google Patents (US139121A, 1873-05-20) and Wikipedia Jacob W. Davis; PBS confirms 1873 jeans."},{"by":"verifier:lead-check","date":"2026-11-01","method":"Re-fetched Google Patents US139121A (dated 1873-05-20, \"Improvement in fastening pocket-openings\", Jacob W. Davis / Levi Strauss) and the Wikipedia Jacob W. Davis extract (May 20, 1873, Patent No. 139,121)."}],"kind":"event","year":1873,"month":5,"day":20},{"id":"hist-emperor-norton","name":"Joshua Norton proclaims himself Emperor","tier":3,"explanation":"A bankrupt rice speculator walked into the Evening Bulletin on September 17, 1859 with a proclamation naming himself Emperor of the United States, and the paper printed it. The city humored Norton I for two decades, honoring his scrip and turning out in the thousands when he died in 1880.","sources":["wp-emperor-norton","norton-trust-reign","sfmuseum-norton"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"sfmuseum Norton chronology: proclamation Sept 17, 1859; died Jan 8, 1880; 10,000 at the funeral. Emperor Norton Trust confirms the Bulletin printed it that evening."}],"kind":"event","year":1859,"month":9,"day":17},{"id":"hist-mark-twain-arrives","name":"Mark Twain moves to San Francisco","tier":4,"explanation":"Samuel Clemens arrived from Virginia City in 1864 and worked as a reporter for the Morning Call and other papers. The Jumping Frog story he published the next year made his name nationally.","sources":["wp-mark-twain","mtp-twain-sf","wp-jumping-frog"],"tags":["literature"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Mark Twain Project: moved to San Francisco in 1864, wrote for the Morning Call. Wikipedia Jumping Frog: published Nov 18, 1865. Year-only item."}],"kind":"event","year":1864},{"id":"hist-golden-gate-park","name":"Golden Gate Park established","tier":2,"explanation":"A state act of April 4, 1870 set aside 1,017 acres of the sandy Outside Lands for a public park. Engineer William Hammond Hall and later superintendent John McLaren turned dunes into forest and meadow.","sources":["wp-golden-gate-park","wp-outside-lands","sfrecpark-ggp","wp-mclaren"],"tags":["parks"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Golden Gate Park and Outside Lands: park act April 4, 1870; sfrecpark.org: 1,017 acres; Wikipedia McLaren: superintendent 1890-1943; Wikipedia Hall: first superintendent."}],"kind":"event","year":1870,"month":4,"day":4},{"id":"hist-first-cable-car","name":"Hallidie tests the first cable car on Clay Street","tier":2,"explanation":"Andrew Hallidie's grip car made its first pre-dawn test run down Clay Street between Leavenworth and Kearny in early August 1873 (accounts give August 1 or 2), with regular service starting September 1. The design let streetcars conquer the city's hills and was copied worldwide.","sources":["wp-clay-street","sfmta-cable-car-150","ohp-chl-500"],"tags":["transit"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CHL 500 says operation started August 1, 1873; SFMTA says the test run was August 2, 1873 and service began Sept 1. Day removed as sources differ; month kept."}],"kind":"event","year":1873,"month":8},{"id":"hist-palace-hotel-opens","name":"Palace Hotel opens","tier":3,"explanation":"Banker William Ralston's enormous Palace on Market Street opened October 2, 1875, five weeks after his bank collapsed and he drowned in the bay. The original burned in 1906; the rebuilt Palace with its glass-roofed Garden Court opened in 1909.","sources":["wp-palace-hotel","pcad-palace-hotel","wp-ralston","sfpalace-history"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia and PCAD: opened Oct 2, 1875; sfpalace.com: opened 1875, reopened 1909. Wikipedia Ralston: died Aug 27, 1875, so \"two months\" corrected to five weeks."}],"kind":"event","year":1875,"month":10,"day":2},{"id":"hist-chinese-exclusion-act","name":"Chinese Exclusion Act signed","tier":2,"explanation":"The first federal law to bar an entire ethnic group from immigrating suspended Chinese labor immigration and blocked Chinese residents from citizenship; it stayed in force until 1943. San Francisco's Chinatown, the port of entry for most Chinese immigrants, bore the brunt of the exclusion era.","sources":["wp-chinese-exclusion","archives-chinese-exclusion","wp-chinese-americans-sf"],"tags":["chinese-american","immigration"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"National Archives: signed May 6, 1882; \"for the first time, federal law proscribed entry of an ethnic working group\". Repeal 1943 per Wikipedia and History of San Francisco (Magnuson Act). Wording aligned to the Archives phrasing."}],"kind":"event","year":1882,"month":5,"day":6},{"id":"hist-sutro-baths-open","name":"Sutro Baths open","tier":3,"explanation":"Adolph Sutro's glass-roofed bathhouse below the Cliff House opened March 14, 1896 with seven pools, six of them saltwater, and room for thousands of swimmers. It burned in 1966 while being demolished; the concrete ruins at Lands End are what remains.","sources":["wp-sutro-baths","pcad-sutro-baths","nps-sutro-baths"],"tags":["landmark"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"NPS Sutro Baths: seven pools, fire in 1966 after demolition began in 1964. Wikipedia and PCAD: opened March 14, 1896. Corrected pool description: six saltwater plus one freshwater."}],"kind":"event","year":1896,"month":3,"day":14},{"id":"hist-ferry-building-opens","name":"Ferry Building opens","tier":3,"explanation":"A. Page Brown's Beaux-Arts terminal with its 245-foot clock tower opened at the foot of Market Street on July 13, 1898. It survived both great earthquakes, spent three decades behind the Embarcadero Freeway, and reopened as a food hall in 2003.","sources":["wp-ferry-building","noehill-ferry-building","wp-page-brown"],"tags":["landmark"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Ferry Building: opened July 13, 1898; 245-foot clock tower (corrected from 235); restored building opened 2003. Wikipedia A. Page Brown confirms architect and 1898."}],"kind":"event","year":1898,"month":7,"day":13},{"id":"hist-1906-earthquake","name":"Great Earthquake and Fire","tier":1,"explanation":"At 5:12 a.m. on April 18, 1906 a magnitude-7.9 rupture of the San Andreas Fault shook the city, and the fires that followed burned for three days. More than 80 percent of San Francisco was destroyed and over 3,000 people died, the deadliest earthquake in US history.","sources":["wp-1906-quake","usgs-1906","nps-prsf-1906","usgs-1906-casualties"],"tags":["earthquake"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"USGS: 5:12 a.m. April 18, 1906; USGS casualties page: more than 3,000 dead. NPS Presidio: fires burned three days. M7.9 and >80% destroyed per USGS/Wikipedia cited."}],"kind":"event","year":1906,"month":4,"day":18},{"id":"hist-cliff-house-burns","name":"Sutro's Victorian Cliff House burns","tier":4,"explanation":"The ornate Victorian 'Gingerbread Palace' Adolph Sutro built in 1896 survived the 1906 quake only to burn to the ground on September 7, 1907. His daughter Emma replaced it with the plain concrete Cliff House of 1909.","sources":["wp-cliff-house","nps-cliff-house"],"tags":["landmark"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia: burned the evening of September 7, 1907; NPS: September 1907, replaced 1909 after Sutro's death. Story count removed because Wikipedia says seven stories and NPS says eight."}],"kind":"event","year":1907,"month":9,"day":7},{"id":"hist-angel-island-opens","name":"Angel Island Immigration Station opens","tier":2,"explanation":"The station opened January 21, 1910 to enforce the Chinese Exclusion Act, detaining and interrogating arrivals for weeks or months. Poems carved into the barracks walls by Chinese detainees were rediscovered in 1970; a 1940 fire closed the station.","sources":["wp-angel-island","aiisf-history","parks-angel-island"],"tags":["immigration","chinese-american"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"AIISF: opened January 21, 1910; California State Parks: opened 1910; Wikipedia: 1940 fire, poems found by ranger Weiss in 1970."}],"kind":"event","year":1910,"month":1,"day":21},{"id":"hist-muni-founded","name":"Muni begins service","tier":3,"explanation":"The city's first municipal streetcars rolled down Geary Street on December 28, 1912, after the private cable franchise lapsed. Muni calls itself the oldest publicly operated transit system in the nation.","sources":["wp-muni","sfmta-history","wp-b-geary"],"tags":["transit"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"SFMTA history: first line on Geary Dec 28, 1912, \"oldest publicly-operated transit system in the nation\"; Wikipedia B Geary: Geary was Muni's first streetcar line, 1912."}],"kind":"event","year":1912,"month":12,"day":28},{"id":"hist-ppie-opens","name":"Panama-Pacific International Exposition opens","tier":2,"explanation":"The world's fair opened February 20, 1915 on 636 acres of filled marsh that became the Marina District, nominally celebrating the Panama Canal but really the city's rebirth after 1906. Nearly 19 million people attended; the Palace of Fine Arts is the only building left on site.","sources":["wp-ppie","nps-ppie","wp-timeline-sf","wp-palace-fine-arts"],"tags":["fair"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"NPS: opened Saturday Feb 20, 1915; over 600 acres; over 18 million visitors. Wikipedia Palace of Fine Arts: only structure surviving on site."}],"kind":"event","year":1915,"month":2,"day":20},{"id":"hist-twin-peaks-tunnel","name":"Twin Peaks Tunnel opens","tier":3,"explanation":"Muni's roughly two-mile streetcar tunnel under Twin Peaks opened February 3, 1918, with Mayor Rolph at the controls of the first car. It cut the west side's travel time to downtown and set off the building boom in West Portal, the Sunset and Parkside.","sources":["wp-twin-peaks-tunnel","sfmta-twin-peaks"],"tags":["transit"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Re-opened cited Wikipedia (opened Feb 3, 1918; 2.27 miles; Mayor Rolph aboard the first revenue car) and SFMTA (February 1918)."}],"kind":"event","year":1918,"month":2,"day":3},{"id":"hist-coit-tower","name":"Coit Tower dedicated","tier":2,"explanation":"The 210-foot fluted column on Telegraph Hill, paid for by Lillie Hitchcock Coit's bequest to beautify the city, was dedicated October 8, 1933. Its lobby murals, painted in 1934 under the first New Deal art program, caused a political uproar over left-wing imagery.","sources":["wp-coit-tower","sfrecpark-coit","wp-lillie-coit"],"tags":["landmark"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Coit Tower: 210 ft, dedicated October 8, 1933; sfrecpark: completed 1933; Wikipedia Lillie Coit: one-third of estate left to beautify the city."}],"kind":"event","year":1933,"month":10,"day":8},{"id":"hist-general-strike-1934","name":"San Francisco General Strike","tier":2,"explanation":"After police killed two men on Bloody Thursday, July 5, during the coastwide longshore strike, the city's unions shut San Francisco down from July 16 to 19, 1934. The strike won the longshoremen their union hiring hall and made Harry Bridges a labor legend.","sources":["wp-1934-strike","oac-1934-strike","ilwu-story","wp-harry-bridges"],"tags":["labor"],"aliases":["1934 waterfront strike"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"ILWU history: July 5 Bloody Thursday, two workers killed, hiring-hall demand; Wikipedia Harry Bridges: four-day general strike followed; OAC finding aid: July 16-19."}],"kind":"event","year":1934,"month":7,"day":16},{"id":"hist-alcatraz-pen-opens","name":"Alcatraz federal penitentiary opens","tier":2,"explanation":"The first 137 federal inmates arrived on August 11, 1934, turning the old army prison into the maximum-security Rock for incorrigibles like Al Capone. Isolation and cost made it the most expensive prison in the system.","sources":["wp-alcatraz-pen","bop-alcatraz","nps-alcatraz-pen","wp-alcatraz-island"],"tags":["alcatraz"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Alcatraz Island: first 137 prisoners arrived Aug 11, 1934; Capone held there. BOP: nearly three times the cost of any other federal prison."}],"kind":"event","year":1934,"month":8,"day":11},{"id":"hist-hetch-hetchy-water","name":"Hetch Hetchy water reaches the Bay Area","tier":3,"explanation":"On October 28, 1934 a crowd at the Pulgas Water Temple watched the first Sierra water arrive after a 160-mile journey from the dammed Hetch Hetchy Valley in Yosemite. The system, authorized by the Raker Act of 1913, still supplies the city's tap water.","sources":["wp-hetch-hetchy","sfpuc-pulgas","wp-pulgas"],"tags":["water"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"SFPUC Pulgas Water Temple: water arrived Oct 28, 1934 after 160+ miles; Wikipedia Pulgas confirms 1934 and ~160 miles."}],"kind":"event","year":1934,"month":10,"day":28},{"id":"hist-bay-bridge-opens","name":"Bay Bridge opens","tier":2,"explanation":"The San Francisco-Oakland Bay Bridge opened to traffic on November 12, 1936, six months before the Golden Gate Bridge, after three years of construction. It was then the longest and most expensive bridge in the world.","sources":["wp-bay-bridge","asce-bay-bridge","wp-purcell"],"tags":["bridge"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"ASCE and Wikipedia: opened Nov 12, 1936; construction began July 1933. Wikipedia Purcell: longest and most expensive bridge ever built at completion."}],"kind":"event","year":1936,"month":11,"day":12},{"id":"hist-golden-gate-bridge-opens","name":"Golden Gate Bridge opens","tier":1,"explanation":"Some 200,000 people walked across on Pedestrian Day, May 27, 1937, and President Roosevelt opened the bridge to cars from the White House the next day. Joseph Strauss's 4,200-foot main span was the longest in the world until 1964.","sources":["wp-golden-gate-bridge","wp-timeline-sf","history-ggb","wp-verrazzano"],"tags":["bridge"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"History.com: Pedestrian Day May 27, 1937, ~200,000 walkers; vehicles May 28; 4,200-ft span. Wikipedia Verrazzano-Narrows: opened Nov 1964 with a longer span."}],"kind":"event","year":1937,"month":5,"day":27},{"id":"hist-ggie-opens","name":"Golden Gate International Exposition opens on Treasure Island","tier":3,"explanation":"The fair opened February 18, 1939 on a roughly 400-acre island dredged from the bay for the occasion, celebrating the two new bridges with a Pacific theme. After a second season in 1940 the island became a naval base.","sources":["wp-ggie","ohp-chl-987","wp-treasure-island"],"tags":["fair"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Treasure Island: built 1936-37, fair opened Feb 18, 1939, island is 393 acres (so \"roughly 400\"). Second season and naval base per cited Wikipedia GGIE and CHL 987."}],"kind":"event","year":1939,"month":2,"day":18},{"id":"hist-un-charter-signed","name":"United Nations Charter signed in San Francisco","tier":2,"explanation":"Delegates from 50 nations met from April 25 to June 26, 1945, holding plenaries at the War Memorial Opera House and signing the Charter on June 26 in the Herbst Theatre of the Veterans Building next door. The UN was born in Civic Center.","sources":["wp-uncio","un-sf-conference","wp-un-charter"],"tags":["world-affairs"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"UN.org: adopted June 25 at the Opera House, signed June 26, 1945 at the Herbst Theatre in the Veterans Building. Wikipedia Charter: signed by 50 countries."}],"kind":"event","year":1945,"month":6,"day":26},{"id":"hist-six-gallery-reading","name":"Six Gallery reading launches the Beats","tier":3,"explanation":"On October 7, 1955 Allen Ginsberg read Howl for the first time at a small art gallery at 3119 Fillmore Street. The night put the San Francisco poetry renaissance on the map and led to the 1957 Howl obscenity trial.","sources":["wp-six-gallery","pw-six-gallery","wp-howl"],"tags":["literature"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Six Gallery: Friday Oct 7, 1955 at 3119 Fillmore Street; Wikipedia Howl: first performed there, 1957 obscenity trial. Removed unsupported \"converted auto shop\" and \"Cow Hollow\"."}],"kind":"event","year":1955,"month":10,"day":7},{"id":"hist-giants-arrive","name":"Giants play their first San Francisco game","tier":2,"explanation":"Fresh from New York, the Giants beat the Dodgers 8-0 at Seals Stadium in the Mission on April 15, 1958, the first major-league game on the West Coast. Candlestick Park opened two years later.","sources":["wp-sf-giants","bbref-1958-04-15","wp-seals-stadium"],"tags":["sports"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Seals Stadium: April 15, 1958 first West Coast major league game, Giants 8-0 over the Dodgers; Baseball-Reference box score."}],"kind":"event","year":1958,"month":4,"day":15},{"id":"hist-candlestick-opens","name":"Candlestick Park opens","tier":3,"explanation":"The Giants' windswept bayside stadium opened April 12, 1960 with Vice President Nixon throwing out the first pitch. It later hosted the 49ers, the Beatles' last concert and the 1989 World Series earthquake before demolition in 2015.","sources":["wp-candlestick","ballparks-candlestick","wp-beatles-1966"],"tags":["sports"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Candlestick: opened April 12, 1960 with Nixon throwing the first pitch; demolished 2015. Wikipedia Beatles 1966 tour: final paid concert Aug 29, 1966 at Candlestick."}],"kind":"event","year":1960,"month":4,"day":12},{"id":"hist-alcatraz-closes","name":"Alcatraz penitentiary closes","tier":3,"explanation":"The prison closed on March 21, 1963 after 29 years; salt air had crumbled the buildings and it cost about three times as much per inmate as other federal prisons. The empty island soon drew Native American occupiers and then tourists.","sources":["wp-alcatraz-pen","bop-alcatraz","wp-alcatraz-island"],"tags":["alcatraz"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Alcatraz Island: closed March 21, 1963. BOP: $10.10 vs $3.00 daily per-capita cost, nearly three times other federal prisons."}],"kind":"event","year":1963,"month":3,"day":21},{"id":"hist-comptons-riot","name":"Compton's Cafeteria riot","tier":3,"explanation":"One August night in 1966, transgender women and drag queens at Gene Compton's all-night cafeteria at Turk and Taylor fought back against police harassment. It predates Stonewall by three years; the exact date is lost because no newspaper covered it.","sources":["wp-comptons","kqed-comptons"],"tags":["lgbtq","tenderloin"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Re-opened cited Wikipedia (August 1966; exact date unknown, no media coverage; Taylor and Turk) and KQED (three years before Stonewall). Month-level date appropriate."}],"kind":"event","year":1966,"month":8},{"id":"hist-summer-of-love","name":"Summer of Love","tier":1,"explanation":"Up to 100,000 young people converged on Haight-Ashbury in the summer of 1967, following the January Human Be-In in Golden Gate Park. By October locals staged a mock funeral for the hippie.","sources":["wp-summer-of-love","wp-history-sf","wp-timeline-sf","wp-human-be-in","wp-haight-ashbury"],"tags":["counterculture","haight"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Summer of Love: ~100,000; Wikipedia Human Be-In: Jan 14, 1967 in Golden Gate Park; Wikipedia Haight-Ashbury: Death of the Hippie funeral Oct 6, 1967."}],"kind":"event","year":1967},{"id":"hist-alcatraz-occupation","name":"Native American occupation of Alcatraz begins","tier":2,"explanation":"On November 20, 1969 the group Indians of All Tribes landed on the abandoned island and held it for 19 months, demanding it be returned to Native people. The occupation helped end the federal termination policy and launched the modern Native rights movement.","sources":["wp-alcatraz-occupation","nps-we-hold-the-rock"],"tags":["alcatraz","indigenous"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Re-opened NPS \"We Hold the Rock\": full occupation Nov 20, 1969 to June 11, 1971; Indians of All Tribes; termination policy ended as a result."}],"kind":"event","year":1969,"month":11,"day":20},{"id":"hist-bart-opens","name":"BART carries its first passengers","tier":2,"explanation":"Revenue service began September 11, 1972 between Fremont and MacArthur in Oakland. San Francisco's Market Street stations opened in November 1973 and the Transbay Tube in September 1974, finally linking the two sides of the bay by rail.","sources":["wp-bart","bart-history","wp-macarthur-bart","wp-market-street-subway","wp-transbay-tube"],"tags":["transit"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia MacArthur station: opened Sept 11, 1972; Market Street subway: BART Nov 5, 1973; Transbay Tube: opened Sept 16, 1974."}],"kind":"event","year":1972,"month":9,"day":11},{"id":"hist-transamerica-pyramid","name":"Transamerica Pyramid completed","tier":2,"explanation":"William Pereira's 853-foot pyramid at Montgomery and Washington was finished in 1972 after fierce opposition to its shape. It stayed the city's tallest building for 45 years until Salesforce Tower passed it.","sources":["wp-transamerica","pcad-transamerica","wp-tallest-sf"],"tags":["skyline"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia list of tallest SF buildings: Transamerica Pyramid 1972, 853 ft, tallest until Salesforce Tower (1,070 ft). Pereira per Wikipedia."}],"kind":"event","year":1972},{"id":"hist-harvey-milk-elected","name":"Harvey Milk elected supervisor","tier":1,"explanation":"The Castro Street camera-shop owner won a seat on the Board of Supervisors on November 8, 1977 in the first district elections, becoming one of the first openly gay elected officials in the country. He took office in January 1978.","sources":["wp-harvey-milk","milk-foundation-bio","wp-1977-sup-election"],"tags":["lgbtq","politics"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia 1977 supervisor election: held Nov 8, 1977, first district-based election. Milk Foundation: one of the first openly gay elected officials; sworn in January 1978."}],"kind":"event","year":1977,"month":11,"day":8},{"id":"hist-milk-moscone-assassinated","name":"Moscone and Milk assassinated","tier":1,"explanation":"Former supervisor Dan White slipped into City Hall through a basement window on November 27, 1978 and shot Mayor George Moscone and Supervisor Harvey Milk. Dianne Feinstein, who announced the deaths, became mayor.","sources":["wp-harvey-milk","milk-foundation-bio","wp-timeline-sf","wp-moscone-milk"],"tags":["lgbtq","politics"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Moscone-Milk assassinations: Nov 27, 1978; White climbed in through a basement window; Feinstein announced the deaths and succeeded Moscone."}],"kind":"event","year":1978,"month":11,"day":27},{"id":"hist-white-night-riots","name":"White Night riots","tier":3,"explanation":"When a jury convicted Dan White only of voluntary manslaughter on May 21, 1979, thousands marched from the Castro to City Hall, smashing its doors and torching a dozen police cars. Police retaliated with a raid on a Castro Street bar that night.","sources":["wp-harvey-milk","history-white-night","wp-timeline-sf","wp-white-night"],"tags":["lgbtq"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia White Night riots: May 21, 1979 manslaughter verdict; a dozen police cars destroyed; retaliatory raid on a Castro gay bar."}],"kind":"event","year":1979,"month":5,"day":21},{"id":"hist-first-aids-report","name":"First report of what became AIDS","tier":3,"explanation":"On June 5, 1981 the CDC's weekly bulletin described five young gay men in Los Angeles with a rare pneumonia; similar clusters soon appeared in San Francisco and New York. The epidemic devastated the Castro and reshaped the city's politics and public health.","sources":["wp-hiv-timeline","cdc-mmwr-1981","hiv-gov-timeline"],"tags":["aids","lgbtq"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CDC MMWR June 5, 1981 (five young men in Los Angeles with Pneumocystis pneumonia); HIV.gov timeline confirms date and description."}],"kind":"event","year":1981,"month":6,"day":5},{"id":"hist-ward-86-opens","name":"Ward 86, the first AIDS clinic, opens at SF General","tier":4,"explanation":"San Francisco General Hospital opened the world's first dedicated AIDS outpatient clinic on January 1, 1983, followed by the Ward 5B inpatient unit that June. Its compassionate, community-linked care became known as the San Francisco model.","sources":["ucsf-aids-40","oac-ward-86"],"tags":["aids"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Re-opened UCSF (world's first dedicated AIDS clinic, Ward 86, opened January 1, 1983; Ward 5B mid-1983) and OAC finding aid (Ward 86 January 1983; Ward 5B June 1983)."}],"kind":"event","year":1983,"month":1,"day":1},{"id":"hist-loma-prieta","name":"Loma Prieta earthquake","tier":1,"explanation":"At 5:04 p.m. on October 17, 1989, as Game 3 of the Bay Bridge World Series was about to start at Candlestick, a magnitude-6.9 quake struck. It killed 63 people, collapsed a Bay Bridge deck section and Oakland's Cypress freeway, and wrecked the Marina District.","sources":["wp-loma-prieta","usgs-loma-prieta","wp-1989-ws"],"tags":["earthquake"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"USGS: Oct 17, 1989, 5:04 p.m., M6.9, 63 deaths. Wikipedia 1989 World Series: struck before Game 3; Cypress Viaduct, Marina District and Bay Bridge damage."}],"kind":"event","year":1989,"month":10,"day":17},{"id":"hist-embarcadero-freeway-demolition","name":"Embarcadero Freeway demolition begins","tier":2,"explanation":"Mayor Art Agnos launched demolition of the quake-damaged double-deck freeway in a rainstorm on February 27, 1991 after a 6-5 Board vote. Its removal reopened the waterfront and the Ferry Building to the city for the first time since 1959.","sources":["wp-embarcadero-freeway","fhwa-feb-27"],"tags":["freeway"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"FHWA By Day and Wikipedia: demolition began Feb 27, 1991 after a 6-5 Board vote; freeway opened Feb 5, 1959. Removed unsupported \"battering ram\" detail."}],"kind":"event","year":1991,"month":2,"day":27},{"id":"hist-dot-com-peak","name":"Dot-com bubble peaks","tier":3,"explanation":"The NASDAQ closed at a record 5,048 on March 10, 2000 and then lost three-quarters of its value over the next two years. The bust hit San Francisco's startup economy hard and briefly reversed the city's rent spiral.","sources":["wp-dot-com","intlbanker-dotcom","wp-nasdaq"],"tags":["tech"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Nasdaq Composite: peaked March 10, 2000, fell 78% by Oct 2002; closing record 5,048.62 per cited sources."}],"kind":"event","year":2000,"month":3,"day":10},{"id":"hist-pacbell-park-opens","name":"Pacific Bell Park opens","tier":2,"explanation":"The Giants' privately financed China Basin ballpark hosted its first regular-season game on April 11, 2000, a 6-5 loss to the Dodgers. Renamed SBC, AT&T and now Oracle Park, it brought splash hits into McCovey Cove and redevelopment to Mission Bay.","sources":["wp-oracle-park","bbref-2000-04-11","wp-2000-giants"],"tags":["sports"],"aliases":["Oracle Park opens","AT&T Park opens"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Baseball-Reference box: April 11, 2000, Dodgers 6, Giants 5. Wikipedia 2000 Giants season: opening series April 11-13 vs. Dodgers."}],"kind":"event","year":2000,"month":4,"day":11},{"id":"hist-central-freeway-removed","name":"Hayes Valley's Central Freeway comes down","tier":3,"explanation":"After a series of ballot fights, the elevated freeway stub north of Market was demolished in 2003 and replaced by tree-lined Octavia Boulevard, which opened September 9, 2005. Hayes Valley went from freeway shadow to boutique district within a decade.","sources":["wp-central-freeway","wp-octavia-blvd","socketsite-octavia"],"tags":["freeway"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Central Freeway: lower deck removed 2003, Octavia Boulevard opened Sept 9, 2005; SocketSite confirms the Friday Sept 9, 2005 opening. \"Three ballot fights\" generalized to \"a series\"."}],"kind":"event","year":2003},{"id":"hist-salesforce-tower-tops-out","name":"Salesforce Tower tops out","tier":3,"explanation":"The final beam was placed on April 6, 2017, making the 1,070-foot tower the tallest building in San Francisco and the second-tallest west of the Mississippi after Los Angeles's Wilshire Grand Center. It opened in January 2018.","sources":["wp-salesforce-tower","cnbc-salesforce-topout","wp-wilshire-grand"],"tags":["skyline"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"CNBC April 6, 2017 topping-out article; Wikipedia Salesforce Tower: 1,070 ft, opened Jan 8, 2018, second-tallest west of the Mississippi after the 1,100-ft Wilshire Grand Center. Replaced the incorrect \"tallest west of Chicago\"."}],"kind":"event","year":2017,"month":4,"day":6},{"id":"hist-chase-center-opens","name":"Chase Center opens in Mission Bay","tier":3,"explanation":"The Warriors' new arena opened September 6, 2019 with Metallica and the San Francisco Symphony; the team's first regular-season game there came October 24. It brought the Warriors back to San Francisco for the first time since they left for Oakland in 1971.","sources":["wp-chase-center","kqed-chase-center","wp-warriors"],"tags":["sports"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"KQED: Metallica and SF Symphony opened the arena Sept 6, 2019; Wikipedia Chase Center: opened Sept 6, 2019, first regular-season game Oct 24. Wikipedia Warriors: 1970-71 was the last San Francisco season before the move to Oakland."}],"kind":"event","year":2019,"month":9,"day":6},{"id":"hist-central-subway-opens","name":"Central Subway opens","tier":3,"explanation":"Weekend-only trains began running under Fourth and Stockton Streets to Chinatown-Rose Pak Station on November 19, 2022, with full T Third service following January 7, 2023. The 1.7-mile line was the first new Muni subway since the Market Street subway opened in 1980.","sources":["wp-central-subway","sfmta-central-subway","wp-chinatown-station","wp-market-street-subway"],"tags":["transit"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Chinatown-Rose Pak station: opened Nov 19, 2022 as a weekend shuttle, regular T service Jan 7, 2023; SFMTA: 1.7 miles, first new subway in over 40 years. Corrected \"since the 1970s\": Muni's Market Street subway opened in 1980."}],"kind":"event","year":2022,"month":11,"day":19},{"id":"hist-outside-lands","name":"The Outside Lands","tier":3,"explanation":"The sandy expanse beyond the settled city was federal land until an 1866 act gave the city title; Golden Gate Park was carved out of it in 1870. The Sunset's dunes were not fully built over until after World War II.","sources":["wp-outside-lands","wp-sunset-district","secretsf-dunes","wp-richmond-district"],"tags":["neighborhoods"],"verification":[{"by":"author:history-agent","date":"2026-11-01","method":"authored; each date/figure checked against cited sources"},{"by":"verifier:history-check","date":"2026-11-01","method":"Wikipedia Outside Lands: Act of March 8, 1866; Richmond and Sunset articles: dune area called Outside Lands; Sunset: last dunes leveled in the 1950s."}],"kind":"fact","question":"What did 19th-century San Franciscans call the dune-covered western part of the city that became the Richmond and Sunset districts?","distractors":["The Western Addition","South of the Slot","The Potrero"]}]},{"id":"sf-neighborhoods","title":"Neighborhoods of San Francisco","subtitle":"From the Mission to Merced Manor","description":"Pinpoint San Francisco's neighborhoods on the map: the 41 official Analysis Neighborhoods used by city agencies, plus the smaller districts, residence parks and historic quarters that locals actually use to name where they live.","map":"sf","order":10,"accent":"fog","sources":[{"id":"datasf-analysis-neighborhoods","title":"Analysis Neighborhoods (41 polygons)","url":"https://data.sf.gov/d/p5b7-5n3h","publisher":"DataSF","accessed":"2026-11-01","note":"Polygon source for `feature` items; lat/lon = area centroid of the largest polygon part, checked to fall inside it."},{"id":"datasf-find-neighborhoods","title":"SF Find Neighborhoods (117 polygons)","url":"https://data.sf.gov/d/gfpk-269f","publisher":"DataSF / Mayor's Office of Neighborhood Services (2006)","accessed":"2026-11-01","note":"Used for lat/lon of small neighborhoods whose Wikipedia article has no coordinates; lat/lon = polygon centroid. GeoJSON: https://data.sf.gov/resource/gfpk-269f.geojson?$limit=500"},{"id":"wp-list-neighborhoods","title":"List of neighborhoods in San Francisco","url":"https://en.wikipedia.org/wiki/List_of_neighborhoods_in_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mission-district","title":"Mission District, San Francisco","url":"https://en.wikipedia.org/wiki/Mission_District,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-castro","title":"Castro District, San Francisco","url":"https://en.wikipedia.org/wiki/Castro_District,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-eureka-valley","title":"Eureka Valley, San 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The Fairmont Hotel and Grace Cathedral now crown the summit.","sources":["wp-nob-hill","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7918,"lon":-122.41495,"category":"neighborhood","feature":"Nob Hill","hint":"Cable cars climb California Street to its top."},{"id":"nh-russian-hill","name":"Russian Hill","tier":1,"explanation":"Gold Rush settlers found a small Russian cemetery on the summit, which gave the hill its name. Its famous one-block stretch of Lombard Street got its switchbacks in 1922 to tame a 27 percent grade.","sources":["wp-russian-hill","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.80044,"lon":-122.41981,"category":"neighborhood","feature":"Russian Hill","hint":"The crooked block of Lombard Street."},{"id":"nh-marina","name":"Marina District","tier":1,"explanation":"Built on landfill that hosted the 1915 Panama-Pacific International Exposition, of which only the Palace of Fine Arts survives. That fill liquefied in the 1989 Loma Prieta earthquake, causing severe damage and fires.","sources":["wp-marina","datasf-analysis-neighborhoods"],"aliases":["The Marina","Marina"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.80144,"lon":-122.43637,"category":"neighborhood","feature":"Marina","hint":"Palace of Fine Arts and Chestnut Street."},{"id":"nh-soma","name":"SoMa","tier":1,"explanation":"Named simply for its position south of Market Street, SoMa holds the Moscone convention center, many museums and tech headquarters, and contains the sub-neighborhoods of South Beach, Yerba Buena and Rincon Hill.","sources":["wp-soma","datasf-analysis-neighborhoods"],"aliases":["South of Market","SOMA"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77725,"lon":-122.40593,"category":"neighborhood","feature":"South of Market","hint":"Moscone Center."},{"id":"nh-financial-district","name":"Financial District","tier":1,"explanation":"The central business district grew on fill over Yerba Buena Cove; Montgomery Street was dubbed the 'Wall Street of the West' and the 1972 Transamerica Pyramid remains its signature tower. This analysis area also takes in South Beach along the Embarcadero south of the Bay Bridge.","sources":["wp-financial-district","wp-list-neighborhoods","datasf-analysis-neighborhoods","wp-transamerica-pyramid"],"aliases":["FiDi","Financial District/South Beach","Downtown"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Removed 'Oracle Park': the ballpark falls inside the DataSF 'Mission Bay' analysis polygon, not this one. Added Transamerica Pyramid source for the 1972 date."}],"kind":"place","map":"sf","lat":37.79042,"lon":-122.39705,"category":"neighborhood","feature":"Financial District/South Beach","hint":"Transamerica Pyramid."},{"id":"nh-golden-gate-park","name":"Golden Gate Park","tier":1,"explanation":"A 1,017-acre park built from 1870 on the sand dunes of the Outside Lands to engineer William Hammond Hall's design; it holds the de Young Museum, the California Academy of Sciences, the Japanese Tea Garden and a bison paddock dating to 1891.","sources":["wp-golden-gate-park","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.76903,"lon":-122.48192,"category":"neighborhood","feature":"Golden Gate Park","hint":"Three miles long between the Richmond and the Sunset."},{"id":"nh-presidio","name":"The Presidio","tier":1,"explanation":"Founded by Spain in 1776 as a fort guarding the Golden Gate, it stayed a military post under Mexico and then the United States until 1994, when it passed to the National Park Service after 219 years of army use. Fort Point and Crissy Field sit on its northern shore.","sources":["wp-presidio","datasf-analysis-neighborhoods"],"aliases":["Presidio","Presidio of San Francisco"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.79738,"lon":-122.46637,"category":"neighborhood","feature":"Presidio","hint":"Army post turned national park at the Golden Gate Bridge."},{"id":"nh-sunset","name":"The Sunset","tier":1,"explanation":"San Francisco's largest and most populous neighborhood, laid out on the dunes of the Outside Lands and filled with Henry Doelger's stucco row houses after the Twin Peaks Tunnel opened. Its western edge is Ocean Beach, which makes the Outer Sunset the foggiest part of the city.","sources":["wp-sunset-district","datasf-analysis-neighborhoods"],"aliases":["Sunset","Sunset District","Sunset/Parkside"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Dropped aliases 'Outer Sunset' and 'Parkside' (separate items nh-outer-sunset, nh-parkside)."}],"kind":"place","map":"sf","lat":37.74838,"lon":-122.49255,"category":"neighborhood","feature":"Sunset/Parkside","hint":"The avenues south of Golden Gate Park."},{"id":"nh-inner-sunset","name":"Inner Sunset","tier":1,"explanation":"The northeastern corner of the Sunset, south of Golden Gate Park and east of 19th Avenue; its commercial heart is 9th Avenue and Irving Street, and UCSF's Parnassus campus rises above it.","sources":["wp-sunset-district","wp-list-neighborhoods","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75847,"lon":-122.46473,"category":"neighborhood","feature":"Inner Sunset","hint":"9th & Irving, beside the park."},{"id":"nh-inner-richmond","name":"Inner Richmond","tier":1,"explanation":"The eastern half of the Richmond District, between Arguello Boulevard and Park Presidio Boulevard; its hub at Geary and Clement is known for Chinese, Thai, Korean, Burmese and Russian restaurants.","sources":["wp-richmond-district","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78095,"lon":-122.46543,"category":"neighborhood","feature":"Inner Richmond","hint":"Clement Street."},{"id":"nh-outer-richmond","name":"Outer Richmond","tier":1,"explanation":"The Richmond's western half, west of Park Presidio Boulevard out to Ocean Beach; it includes Sutro Heights above the Cliff House and the Geary Boulevard stretch sometimes called Little Russia.","sources":["wp-richmond-district","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Removed unsupported 'Lands End area' (not in cited sources)."}],"kind":"place","map":"sf","lat":37.77806,"lon":-122.49182,"category":"neighborhood","feature":"Outer Richmond","hint":"Runs out to the Cliff House."},{"id":"nh-pacific-heights","name":"Pacific Heights","tier":1,"explanation":"A ridge of historic mansions, including sugar baron Adolph Spreckels's, with views of the Golden Gate and the bay; Lafayette and Alta Plaza parks sit at its crest and boutiques line Fillmore Street. It ranks among the most expensive neighborhoods in the country.","sources":["wp-pacific-heights","datasf-analysis-neighborhoods"],"aliases":["Pac Heights"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.79102,"lon":-122.43483,"category":"neighborhood","feature":"Pacific Heights","hint":"Spreckels Mansion and Lafayette Park."},{"id":"nh-tenderloin","name":"The Tenderloin","tier":1,"explanation":"About fifty blocks of flatland between Union Square and Civic Center; one story traces the name to a police captain who said the bribes here let him afford tenderloin steak. Two blocks of Larkin Street are officially Little Saigon, and Glide Memorial Church is a neighborhood institution.","sources":["wp-tenderloin","datasf-analysis-neighborhoods"],"aliases":["Tenderloin","TL"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78316,"lon":-122.41526,"category":"neighborhood","feature":"Tenderloin","hint":"Between Union Square and Civic Center."},{"id":"nh-bernal-heights","name":"Bernal Heights","tier":1,"explanation":"A hilltop neighborhood south of the Mission crowned by a bare summit with a microwave tower; it grew after 1906 as earthquake refugees settled here, and a few of the tiny relief cottages survive. Cortland Avenue is its main street.","sources":["wp-bernal-heights","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.74036,"lon":-122.41566,"category":"neighborhood","feature":"Bernal Heights","hint":"Cortland Avenue; the bare hill with the tower."},{"id":"nh-noe-valley","name":"Noe Valley","tier":1,"explanation":"Named for José de Jesús Noé, the last Mexican alcalde of Yerba Buena, whose Rancho San Miguel covered the area; the 24th Street shops and its many young families earned it the nickname 'Stroller Valley'.","sources":["wp-noe-valley","datasf-analysis-neighborhoods","wp-list-streets"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added 'List of streets in San Francisco' source for 24th Street as Noe Valley's commercial corridor (not in the Noe Valley article)."}],"kind":"place","map":"sf","lat":37.74892,"lon":-122.43332,"category":"neighborhood","feature":"Noe Valley","hint":"24th Street, south of the Castro."},{"id":"nh-potrero-hill","name":"Potrero Hill","tier":1,"explanation":"Spanish missionaries grazed cattle here and called it Potrero Nuevo, 'new pasture'. One of the sunniest neighborhoods, it has a block of Vermont Street with seven switchbacks, more crooked than Lombard, and was long home to Anchor Brewing.","sources":["wp-potrero-hill","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75887,"lon":-122.3936,"category":"neighborhood","feature":"Potrero Hill","hint":"Sunny hill east of the Mission, facing downtown."},{"id":"nh-twin-peaks","name":"Twin Peaks","tier":1,"explanation":"Two hills of about 925 feet near the geographic center of the city, second only to Mount Davidson in height; the Spanish name was replaced by 'Twin Peaks' under American rule. The neighborhood surrounds the summits and the Muni tunnel runs beneath them.","sources":["wp-twin-peaks","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75211,"lon":-122.4498,"category":"neighborhood","feature":"Twin Peaks","hint":"The summit lookout above Market Street."},{"id":"nh-hayes-valley","name":"Hayes Valley","tier":2,"explanation":"Named for Thomas Hayes, county clerk in the 1850s and founder of the first Market Street Railway franchise. After the quake-damaged Central Freeway was torn down, boutiques and restaurants filled Hayes Street, and Patricia's Green now occupies part of the freeway's path.","sources":["wp-hayes-valley","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77479,"lon":-122.42904,"category":"neighborhood","feature":"Hayes Valley","hint":"Between Alamo Square and Civic Center."},{"id":"nh-japantown","name":"Japantown","tier":2,"explanation":"About six blocks of the Western Addition and one of the oldest ethnic enclaves in the United States; the Japan Center mall opened in 1968 with the Peace Pagoda, a gift from the people of Osaka.","sources":["wp-japantown","datasf-analysis-neighborhoods"],"aliases":["Nihonmachi"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78509,"lon":-122.43413,"category":"neighborhood","feature":"Japantown","hint":"Peace Pagoda on Post Street."},{"id":"nh-western-addition","name":"Western Addition","tier":2,"explanation":"Platted in the 1850s as the 'addition' west of Larkin Street, the historic sense covered some 500 blocks. Today the name usually means the Fillmore area, which largely escaped the 1906 fire, became a jazz center, and was then reshaped by controversial redevelopment.","sources":["wp-western-addition","wp-fillmore","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78183,"lon":-122.43063,"category":"neighborhood","feature":"Western Addition","hint":"Includes the Fillmore and Alamo Square."},{"id":"nh-glen-park","name":"Glen Park","tier":2,"explanation":"A hillside neighborhood south of Twin Peaks beside Glen Canyon Park, where Islais Creek still runs above ground. Its small 'village' of shops at Chenery and Diamond sits by the BART station; the name dates to an 1890s pleasure ground and zoo.","sources":["wp-glen-park","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7396,"lon":-122.43632,"category":"neighborhood","feature":"Glen Park","hint":"The 'village' by Glen Canyon and its BART station."},{"id":"nh-excelsior","name":"The Excelsior","tier":2,"explanation":"A district along Mission Street west of McLaren Park where the streets are named for world capitals and the avenues for countries, a scheme credited to Emanuel Lewis and his daughter Jeannette.","sources":["wp-excelsior","datasf-analysis-neighborhoods"],"aliases":["Excelsior","Excelsior District"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Removed unsupported 'working-class'."}],"kind":"place","map":"sf","lat":37.71856,"lon":-122.43181,"category":"neighborhood","feature":"Excelsior","hint":"Streets named after capitals and countries."},{"id":"nh-bayview-hunters-point","name":"Bayview-Hunters Point","tier":2,"explanation":"The southeastern corner of the city, strung along Third Street from India Basin to Candlestick Point. Once 'Butchertown' for its slaughterhouses, it later held the Hunters Point Naval Shipyard, which employed 17,000 at its peak and is now a Superfund cleanup site.","sources":["wp-bayview-hunters-point","wp-hunters-point-shipyard","datasf-analysis-neighborhoods"],"aliases":["Bayview Hunters Point","Bayview–Hunters Point"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Dropped aliases 'Bayview' and 'Hunters Point' (separate items nh-bayview, nh-hunters-point)."}],"kind":"place","map":"sf","lat":37.73089,"lon":-122.38602,"category":"neighborhood","feature":"Bayview Hunters Point","hint":"Third Street and the old naval shipyard."},{"id":"nh-mission-bay","name":"Mission Bay","tier":2,"explanation":"A 303-acre district on filled bay land that was a Southern Pacific railyard until the late 1990s; it now holds the UCSF Mission Bay campus, the Chase Center arena and the headquarters of Uber and Visa.","sources":["wp-mission-bay","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77166,"lon":-122.39357,"category":"neighborhood","feature":"Mission Bay","hint":"Chase Center and UCSF's newest campus."},{"id":"nh-treasure-island","name":"Treasure Island","tier":2,"explanation":"An artificial island built in 1936–37 for the 1939 Golden Gate International Exposition and taken over by the Navy in 1941; a 900-foot causeway links it to natural Yerba Buena Island and the Bay Bridge.","sources":["wp-treasure-island","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.82066,"lon":-122.36954,"category":"neighborhood","feature":"Treasure Island","hint":"Man-made island in the middle of the bay."},{"id":"nh-visitacion-valley","name":"Visitacion Valley","tier":2,"explanation":"A valley in the far southeast named in 1777 when Spanish friars celebrated the feast of the Visitation here; the Cow Palace straddles its border with Daly City and the Sunnydale housing community lies within it.","sources":["wp-visitacion-valley","datasf-analysis-neighborhoods"],"aliases":["Viz Valley"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71287,"lon":-122.4101,"category":"neighborhood","feature":"Visitacion Valley","hint":"Cow Palace and the county line."},{"id":"nh-outer-mission","name":"Outer Mission","tier":2,"explanation":"A residential district along Mission Street near the Daly City line, bounded by Geneva Avenue and Interstate 280; Muni's historic streetcar car barn stands at its northern corner and Cayuga Park lies within it.","sources":["wp-outer-mission","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72065,"lon":-122.44392,"category":"neighborhood","feature":"Outer Mission","hint":"Mission Street near the city limit."},{"id":"nh-portola","name":"Portola","tier":2,"explanation":"Pronounced 'PORE-toe-luh' by locals, it was named for a school honoring explorer Gaspar de Portolà. Italian and Jewish nurserymen once grew much of the city's flowers here, earning it the nickname 'Garden District'; San Bruno Avenue is its main street.","sources":["wp-portola","datasf-analysis-neighborhoods"],"aliases":["Portola District"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72679,"lon":-122.40899,"category":"neighborhood","feature":"Portola","hint":"The Garden District on San Bruno Avenue."},{"id":"nh-sea-cliff","name":"Sea Cliff","tier":2,"explanation":"An elite residence park laid out by landscape architect Mark Daniels on the bluffs between Baker Beach and Lincoln Park; China Beach and the trailhead to Lands End lie within it.","sources":["wp-sea-cliff","datasf-analysis-neighborhoods"],"aliases":["Seacliff"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78668,"lon":-122.48687,"category":"neighborhood","feature":"Seacliff","hint":"China Beach."},{"id":"nh-presidio-heights","name":"Presidio Heights","tier":2,"explanation":"A small, affluent enclave of early-1900s Edwardian homes just south of the Presidio wall between Arguello Boulevard and Presidio Avenue, with shops on Sacramento Street. The name predates the 1906 earthquake.","sources":["wp-list-neighborhoods","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78631,"lon":-122.45166,"category":"neighborhood","feature":"Presidio Heights","hint":"Sacramento Street shops against the Presidio wall."},{"id":"nh-lakeshore","name":"Lakeshore","tier":3,"explanation":"The city's southwestern corner around Lake Merced, taking in San Francisco State University, Stonestown, Parkmerced, Lowell High School and Fort Funston. The lake itself is ringed by three golf courses.","sources":["wp-lake-merced","wp-list-neighborhoods","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Tier 2 -> 3."}],"kind":"place","map":"sf","lat":37.72021,"lon":-122.49035,"category":"neighborhood","feature":"Lakeshore","hint":"Lake Merced and SF State."},{"id":"nh-mclaren-park","name":"McLaren Park","tier":2,"explanation":"At 313 acres, John McLaren Park is the second-largest park run by the city's Recreation and Park Department after Golden Gate Park. Ringed by the Excelsior, Portola and Visitacion Valley, it holds the Jerry Garcia Amphitheater and the 2.7-mile Philosopher's Way loop trail.","sources":["wp-mclaren-park","datasf-analysis-neighborhoods"],"aliases":["John McLaren Park"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71794,"lon":-122.41869,"category":"neighborhood","feature":"McLaren Park","hint":"Jerry Garcia Amphitheater."},{"id":"nh-west-of-twin-peaks","name":"West of Twin Peaks","tier":3,"explanation":"A cluster of early-20th-century residence parks around Mount Davidson, the city's 928-foot high point with its concrete cross: Forest Hill, St. Francis Wood, Westwood Park and their neighbors, with West Portal as their shopping center.","sources":["wp-mount-davidson","wp-st-francis-wood","wp-list-neighborhoods","datasf-analysis-neighborhoods","wp-west-portal","wp-forest-hill"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added West Portal and Forest Hill sources (shopping district; residence parks). Tier 2 -> 3."}],"kind":"place","map":"sf","lat":37.73518,"lon":-122.45994,"category":"neighborhood","feature":"West of Twin Peaks","hint":"Mount Davidson and the residence parks."},{"id":"nh-omi","name":"Oceanview / Merced Heights / Ingleside","tier":3,"explanation":"Three neighborhoods in the south of the city known jointly as the OMI, along Ocean Avenue and the Muni M line; after World War II they became home to a large African American community that by 1970 made up more than half of residents.","sources":["wp-oceanview","datasf-analysis-neighborhoods","wp-list-neighborhoods"],"aliases":["OMI","Oceanview/Merced/Ingleside","Oceanview","Ocean View"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added list source for the OMI = Oceanview, Merced Heights, Ingleside expansion. Tier 2 -> 3."}],"kind":"place","map":"sf","lat":37.717,"lon":-122.46091,"category":"neighborhood","feature":"Oceanview/Merced/Ingleside","hint":"Ocean Avenue near City College."},{"id":"nh-lincoln-park","name":"Lincoln Park","tier":2,"explanation":"A roughly 100-acre park on the city's northwest tip, created in 1909 on the former Golden Gate Cemetery; it holds the Legion of Honor museum, an 18-hole golf course and the western terminus of the Lincoln Highway.","sources":["wp-lincoln-park","datasf-analysis-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78448,"lon":-122.50141,"category":"neighborhood","feature":"Lincoln Park","hint":"Legion of Honor."},{"id":"nh-lone-mountain-usf","name":"Lone Mountain / USF","tier":2,"explanation":"The hill the Spanish called El Divisadero became the Lone Mountain Cemetery complex from 1854; after the graves moved to Colma, the summit became Lone Mountain College, now the northern half of the Jesuit University of San Francisco, founded in 1855.","sources":["wp-lone-mountain","wp-usf","datasf-analysis-neighborhoods"],"aliases":["Lone Mountain","USF","University of San Francisco"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the DataSF Analysis Neighborhoods polygon (inside-polygon check passed)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: point-in-polygon and recomputed centroid against the DataSF Analysis Neighborhoods polygon; coordinates cross-checked with Nominatim and Wikidata P625; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77762,"lon":-122.4496,"category":"neighborhood","feature":"Lone Mountain/USF","hint":"USF's hilltop campus."},{"id":"nh-cole-valley","name":"Cole Valley","tier":2,"explanation":"A compact neighborhood in a U-shaped valley below Twin Peaks, often called the smallest in the city; it grew around the streetcar stop at Carl and Cole at the mouth of the Sunset Tunnel, where the N Judah still stops.","sources":["wp-cole-valley","wp-list-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Cole Valley, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.76485,"lon":-122.44975,"category":"neighborhood","toleranceKm":0.4,"hint":"Carl & Cole, where the N Judah enters the tunnel."},{"id":"nh-dogpatch","name":"Dogpatch","tier":2,"explanation":"A half-industrial waterfront neighborhood once part of Potrero Nuevo; it came through 1906 largely intact, so it keeps some of the city's oldest houses from the 1860s. The historic Pier 70 shipyards line its shore and Third Street is its spine.","sources":["wp-dogpatch"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Dogpatch, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7606,"lon":-122.39107,"category":"neighborhood","toleranceKm":0.5,"hint":"Pier 70 and Third Street, east of Potrero Hill."},{"id":"nh-alamo-square","name":"Alamo Square","tier":2,"explanation":"A Western Addition neighborhood around a four-block hilltop park set aside in 1856 by Mayor Van Ness and named for a lone cottonwood (álamo) at a watering hole on the trail to the Presidio. The 'Painted Ladies' Victorians on Steiner Street face the park.","sources":["wp-alamo-square"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Alamo Square, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77638,"lon":-122.43471,"category":"neighborhood","toleranceKm":0.5,"hint":"Painted Ladies face its park."},{"id":"nh-duboce-triangle","name":"Duboce Triangle","tier":3,"explanation":"A wedge between the Castro, the Lower Haight and the Mission, named for Victor Duboce, a Spanish-American War lieutenant colonel. Sheltered east of Twin Peaks, it gets less fog than much of the city; the N Judah runs along Duboce Park.","sources":["wp-duboce-triangle"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Duboce Triangle, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.768,"lon":-122.433,"category":"neighborhood","toleranceKm":0.5,"hint":"Duboce Park, where the N Judah surfaces."},{"id":"nh-lower-haight","name":"Lower Haight","tier":3,"explanation":"The stretch of Haight Street east of Divisadero toward Market, sometimes called Haight-Fillmore; its Victorians are plainer than those of the Upper Haight, and the 1937 San Francisco Mint sits at its edge.","sources":["wp-lower-haight","wp-sf-mint"],"aliases":["Haight-Fillmore"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Lower Haight, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added San Francisco Mint source for the 1937 date."}],"kind":"place","map":"sf","lat":37.7721,"lon":-122.4305,"category":"neighborhood","toleranceKm":0.5,"hint":"Haight Street east of Divisadero."},{"id":"nh-cow-hollow","name":"Cow Hollow","tier":2,"explanation":"A valley between Pacific Heights and the Marina that was dairy pasture in the 19th century, when the shoreline lay much closer than it does today; Union Street is its shopping strip.","sources":["wp-list-neighborhoods","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Cow Hollow\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.79733,"lon":-122.44259,"category":"neighborhood","toleranceKm":0.6,"hint":"Union Street boutiques."},{"id":"nh-telegraph-hill","name":"Telegraph Hill","tier":2,"explanation":"Named for the 1849 semaphore and the 1853 marine telegraph that signalled arriving ships from its 285-foot summit, where Coit Tower was built in 1933. Gardens line the Filbert Steps and a flock of feral parrots lives on the hill.","sources":["wp-telegraph-hill"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Telegraph Hill, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.80241,"lon":-122.40587,"category":"neighborhood","toleranceKm":0.4,"hint":"Coit Tower."},{"id":"nh-jackson-square","name":"Jackson Square","tier":3,"explanation":"A six-block historic district of Gold Rush-era commercial buildings north of the Transamerica Pyramid, among the few downtown blocks to survive 1906. The survival of Hotaling's whiskey warehouse inspired the verse asking why God 'spared Hotaling's whiskey'.","sources":["wp-jackson-square","wp-hotaling-building","wp-list-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Hotaling Building)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Replaced unsupported '1850s-60s brick' with 'Gold Rush-era' (article: classical revival and Italianate commercial buildings, period of significance from 1850)."}],"kind":"place","map":"sf","lat":37.7964,"lon":-122.4028,"category":"neighborhood","toleranceKm":0.4,"hint":"Just north of the Transamerica Pyramid."},{"id":"nh-union-square","name":"Union Square","tier":1,"explanation":"A 2.6-acre plaza dedicated in 1850 and named for the pro-Union rallies held there before and during the Civil War; the 1903 Dewey Monument stands at its center, and the surrounding blocks form the city's main shopping and theater district.","sources":["wp-union-square"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Union Square, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Tier 2 -> 1."}],"kind":"place","map":"sf","lat":37.78806,"lon":-122.4075,"category":"neighborhood","toleranceKm":0.4,"hint":"Dewey Monument; Powell Street cable cars."},{"id":"nh-embarcadero","name":"The Embarcadero","tier":1,"explanation":"The eastern waterfront boulevard built on fill along a three-mile seawall, running from King Street past the 1898 Ferry Building to Pier 45. The elevated Embarcadero Freeway cut it off from downtown until it was demolished in 1991 after the Loma Prieta earthquake.","sources":["wp-embarcadero","wp-ferry-building"],"aliases":["Embarcadero"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (San Francisco Ferry Building)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Tier 2 -> 1."}],"kind":"place","map":"sf","lat":37.7955,"lon":-122.3937,"category":"neighborhood","toleranceKm":0.8,"hint":"Ferry Building clock tower."},{"id":"nh-south-beach","name":"South Beach","tier":3,"explanation":"Mixed-use blocks along the Embarcadero and King Street south of the Bay Bridge, one of SoMa's sub-neighborhoods; Oracle Park, home of the Giants, sits in its southeastern corner.","sources":["wp-list-neighborhoods","wp-soma","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"South Beach\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78167,"lon":-122.38929,"category":"neighborhood","toleranceKm":0.6,"hint":"Oracle Park."},{"id":"nh-rincon-hill","name":"Rincon Hill","tier":3,"explanation":"Spanish rincón means 'corner'; this hill south of the Financial District was the city's first fashionable address after the Gold Rush, then an industrial zone, and was partly cut away for the Bay Bridge in the 1930s. It is now a high-rise district marketed as 'The East Cut'.","sources":["wp-rincon-hill","wp-list-neighborhoods"],"aliases":["East Cut","The East Cut"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Rincon Hill, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78556,"lon":-122.39194,"category":"neighborhood","toleranceKm":0.5,"hint":"Where the Bay Bridge lands."},{"id":"nh-yerba-buena","name":"Yerba Buena","tier":3,"explanation":"The SoMa blocks between Second and Fifth streets anchored by Yerba Buena Gardens, opened in 1993 beside and partly on top of the Moscone Center. The name recalls the Spanish- and Mexican-era outpost of Yerba Buena that grew into San Francisco, itself named for a local herb.","sources":["wp-list-neighborhoods","wp-yerba-buena-gardens","wp-financial-district"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Yerba Buena Gardens)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Reworded Moscone relationship (bridge sits atop part of Moscone); dropped 'fragrant'; added Financial District source for the Yerba Buena outpost."}],"kind":"place","map":"sf","lat":37.7848,"lon":-122.4027,"category":"neighborhood","toleranceKm":0.5,"hint":"Gardens above the Moscone Center."},{"id":"nh-civic-center","name":"Civic Center","tier":2,"explanation":"An ensemble of classical-style government and cultural buildings rebuilt after 1906, with City Hall finished in 1915. The United Nations Charter was signed in the Veterans Building in 1945, and the district is a National Historic Landmark.","sources":["wp-civic-center","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Civic Center\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"'Beaux-Arts' not in cited source; article says 'classical architectural style'."}],"kind":"place","map":"sf","lat":37.77861,"lon":-122.41908,"category":"neighborhood","toleranceKm":0.5,"hint":"City Hall's dome."},{"id":"nh-polk-gulch","name":"Polk Gulch","tier":3,"explanation":"The commercial corridor of Polk Street, named with a wink because the street follows an old stream at the bottom of a shallow valley. It was the city's main gay neighborhood from the 1950s until the Castro took over, and hosted the first official Pride parade in 1972.","sources":["wp-polk-street","wp-list-neighborhoods","datasf-find-neighborhoods"],"aliases":["Polk Village"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Polk Gulch\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.79419,"lon":-122.42141,"category":"neighborhood","toleranceKm":0.6,"hint":"Polk Street between the Tenderloin and Russian Hill."},{"id":"nh-cathedral-hill","name":"Cathedral Hill","tier":3,"explanation":"A Western Addition rise named for St. Mary's Cathedral at Geary and Gough, seat of the Catholic archdiocese; the Jack Tar Hotel, later the Cathedral Hill Hotel, stood at Van Ness until it was demolished for a new hospital.","sources":["wp-cathedral-hill","wp-list-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Cathedral Hill, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78423,"lon":-122.42537,"category":"neighborhood","toleranceKm":0.5,"hint":"St. Mary's Cathedral."},{"id":"nh-fillmore","name":"The Fillmore","tier":2,"explanation":"Centered on Fillmore Street south of Geary, it boomed after 1906 and by the 1940s and 50s was the 'Harlem of the West', with the largest jazz scene on the coast, before redevelopment displaced many Black residents. The Fillmore Auditorium at Geary and Fillmore hosted the 1960s psychedelic scene.","sources":["wp-fillmore"],"aliases":["Fillmore","Fillmore District"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Fillmore District, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7805,"lon":-122.4322,"category":"neighborhood","toleranceKm":0.6,"hint":"The Fillmore Auditorium."},{"id":"nh-laurel-heights","name":"Laurel Heights","tier":3,"explanation":"A neighborhood between Presidio Heights and the Richmond built on part of the old Lone Mountain cemetery complex, whose graves were moved to Colma by 1941; the Laurel Village shops on California Street serve it.","sources":["wp-laurel-heights","wp-lone-mountain-cemetery"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Laurel Heights, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78414,"lon":-122.45269,"category":"neighborhood","toleranceKm":0.5,"hint":"Laurel Village shopping center."},{"id":"nh-jordan-park","name":"Jordan Park","tier":4,"explanation":"A small enclave between Arguello Boulevard and Parker Avenue, California Street and Geary Boulevard, often mistaken for part of Laurel Heights or the Richmond.","sources":["wp-list-neighborhoods","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centre of the boundaries given in the Wikipedia list article (Arguello Blvd, Geary Blvd, California St, Parker Ave); the SF Find polygon merges it with Laurel Heights"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Removed unsupported 'of detached homes'."}],"kind":"place","map":"sf","lat":37.7835,"lon":-122.456,"category":"neighborhood","toleranceKm":0.5,"hint":"Just west of Laurel Heights, north of Geary."},{"id":"nh-anza-vista","name":"Anza Vista","tier":4,"explanation":"A Western Addition subdivision built on the former Calvary Cemetery after San Francisco's graves were moved to Colma; it is named for Juan Bautista de Anza, the Spanish explorer who reached the peninsula in 1776.","sources":["wp-anza-vista","wp-richmond-district"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Anza Vista, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added Richmond District source for Anza's 1776 arrival (Mountain Lake)."}],"kind":"place","map":"sf","lat":37.78087,"lon":-122.44319,"category":"neighborhood","toleranceKm":0.4,"hint":"Between Geary and Turk, near USF."},{"id":"nh-lake-street","name":"Lake Street","tier":4,"explanation":"A strip of grand Edwardian and Victorian homes south of the Presidio between Arguello and 27th Avenue, named for Lake Street and nearby Mountain Lake, where Juan Bautista de Anza camped in 1776 before choosing the Presidio site.","sources":["wp-list-neighborhoods","wp-richmond-district","datasf-find-neighborhoods"],"aliases":["Lake District"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Lake Street\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78551,"lon":-122.47963,"category":"neighborhood","toleranceKm":0.7,"hint":"Along the Presidio's southern wall."},{"id":"nh-sutro-heights","name":"Sutro Heights","tier":3,"explanation":"The bluff above the Cliff House where Comstock silver baron Adolph Sutro built his estate from 1881; the gardens became a public park in 1938 and the Outer Richmond blocks beside it, also called Vista del Mar, take their name from it.","sources":["wp-sutro-heights-park","wp-list-neighborhoods","datasf-find-neighborhoods"],"aliases":["Vista del Mar"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Sutro Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77797,"lon":-122.50793,"category":"neighborhood","toleranceKm":0.5,"hint":"Above the Cliff House."},{"id":"nh-parkside","name":"Parkside","tier":3,"explanation":"The southern Sunset below Quintara, launched in 1905 by a William Crocker syndicate on land bought from Adolph Sutro's estate; the 'park' was the grove around Pine Lake by Stern Grove. Taraval Street is its commercial strip.","sources":["wp-parkside"],"aliases":["The Parkside","Parkside District"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Parkside, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.744,"lon":-122.48,"category":"neighborhood","toleranceKm":0.8,"hint":"Taraval Street and Stern Grove."},{"id":"nh-golden-gate-heights","name":"Golden Gate Heights","tier":3,"explanation":"A hilly Sunset neighborhood with 14 blocks of public stairways, including the mosaic-covered 16th Avenue Tiled Steps that climb to Grandview Park, a 666-foot chert outcrop with views to the ocean.","sources":["wp-list-neighborhoods","wp-16th-avenue-tiled-steps","wp-grandview-park","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Golden Gate Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75202,"lon":-122.47094,"category":"neighborhood","toleranceKm":0.6,"hint":"Tiled steps up to Grandview Park."},{"id":"nh-forest-hill","name":"Forest Hill","tier":3,"explanation":"One of the city's eight master-planned residence parks, with curving streets below Mount Sutro; Bernard Maybeck designed several homes and the clubhouse. Its Muni station sits midway through the Twin Peaks Tunnel.","sources":["wp-forest-hill","wp-twin-peaks-tunnel","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Forest Hill\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.74793,"lon":-122.46372,"category":"neighborhood","toleranceKm":0.5,"hint":"Residence park above Laguna Honda."},{"id":"nh-forest-knolls","name":"Forest Knolls","tier":4,"explanation":"Detached homes on the southwestern slope of Mount Sutro, wrapped in the hill's old eucalyptus forest, just below the UCSF Parnassus campus.","sources":["wp-forest-knolls","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Forest Knolls\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75489,"lon":-122.45979,"category":"neighborhood","toleranceKm":0.4,"hint":"In the eucalyptus below Mount Sutro."},{"id":"nh-midtown-terrace","name":"Midtown Terrace","tier":4,"explanation":"A late-1950s subdivision on the western slope of Twin Peaks, wound through by Panorama Drive; Sutro Tower rises on its northern side.","sources":["wp-list-neighborhoods","wp-sutro-tower","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Midtown Terrace\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7503,"lon":-122.4504,"category":"neighborhood","toleranceKm":0.5,"hint":"Under Sutro Tower, west of Twin Peaks."},{"id":"nh-miraloma-park","name":"Miraloma Park","tier":4,"explanation":"A residential neighborhood between Glen Canyon Park and Mount Davidson, on the eastern flank of the city's 928-foot high point and its 103-foot concrete cross, site of an annual Easter service.","sources":["wp-list-neighborhoods","wp-mount-davidson","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Miraloma Park\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Corrected 'encircling': Mount Davidson article places Miraloma Park on the east side only (Westwood Highlands and Sherwood Forest to the southwest)."}],"kind":"place","map":"sf","lat":37.7389,"lon":-122.44905,"category":"neighborhood","toleranceKm":0.6,"hint":"East of Mount Davidson, above Glen Canyon."},{"id":"nh-st-francis-wood","name":"St. Francis Wood","tier":3,"explanation":"A residence park established in 1912 with curving streets, landscaped medians and monuments laid out by the Olmsted Brothers; it has no businesses at all and is a National Register historic district.","sources":["wp-st-francis-wood","datasf-find-neighborhoods"],"aliases":["Saint Francis Wood"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"St. Francis Wood\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.73627,"lon":-122.46606,"category":"neighborhood","toleranceKm":0.5,"hint":"Fountain and gateways off Portola Drive."},{"id":"nh-west-portal","name":"West Portal","tier":2,"explanation":"Named for the western mouth of the Twin Peaks streetcar tunnel, which opened in 1918; West Portal Avenue's village-like strip of shops is the main shopping street of the southwest side.","sources":["wp-west-portal","wp-twin-peaks-tunnel","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"West Portal\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.73977,"lon":-122.47066,"category":"neighborhood","toleranceKm":0.5,"hint":"Where the K, L and M lines leave the tunnel."},{"id":"nh-balboa-terrace","name":"Balboa Terrace","tier":5,"explanation":"A small residential tract along the southern edge of St. Francis Wood, bounded by Junipero Serra Boulevard, Monterey Boulevard, Aptos Avenue and Ocean Avenue.","sources":["wp-balboa-terrace"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Balboa Terrace, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7313,"lon":-122.4687,"category":"neighborhood","toleranceKm":0.4,"hint":"South edge of St. Francis Wood."},{"id":"nh-ingleside-terraces","name":"Ingleside Terraces","tier":3,"explanation":"About 750 detached homes built from 1910 on the old Ingleside Racetrack; oval Urbano Drive follows the former track and a giant sundial stands at its center on Entrada Court.","sources":["wp-ingleside-terraces"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Ingleside Terraces, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.725,"lon":-122.46861,"category":"neighborhood","toleranceKm":0.5,"hint":"Oval street on an old racetrack, with a sundial."},{"id":"nh-parkmerced","name":"Parkmerced","tier":3,"explanation":"A planned complex of towers and garden apartments built by Metropolitan Life in the 1940s beside Lake Merced, designed by Leonard Schultze and Thomas Church; with 3,221 units it is one of the largest single-owner apartment neighborhoods in the West.","sources":["wp-parkmerced"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Parkmerced, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71835,"lon":-122.47923,"category":"neighborhood","toleranceKm":0.6,"hint":"Towers and garden apartments west of SF State."},{"id":"nh-stonestown","name":"Stonestown","tier":3,"explanation":"The area around Stonestown Galleria on 19th Avenue, opened in 1952 by the Stoneson brothers with the Emporium as its anchor, just north of San Francisco State University.","sources":["wp-stonestown-galleria","datasf-find-neighborhoods","wp-list-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Stonestown\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added list source for 19th Avenue location."}],"kind":"place","map":"sf","lat":37.72652,"lon":-122.47563,"category":"neighborhood","toleranceKm":0.6,"hint":"The mall by SF State."},{"id":"nh-merced-heights","name":"Merced Heights","tier":4,"explanation":"The 'M' of the OMI, a hillside of mostly single-family homes between Holloway Avenue and Shields Street; the rocky outcrop at Shields and Orizaba, about 500 feet up, is its high point.","sources":["wp-list-neighborhoods","wp-oceanview","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Merced Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71375,"lon":-122.46741,"category":"neighborhood","toleranceKm":0.5,"hint":"The hill between Ingleside Terraces and Daly City."},{"id":"nh-ingleside","name":"Ingleside","tier":3,"explanation":"The 'I' of the OMI, along Ocean Avenue near City College and Balboa Park BART; after World War II it became a center of Black homeownership on the city's southwest side.","sources":["wp-list-neighborhoods","wp-oceanview","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Ingleside\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72069,"lon":-122.46141,"category":"neighborhood","toleranceKm":0.6,"hint":"Ocean Avenue by City College."},{"id":"nh-mission-terrace","name":"Mission Terrace","tier":4,"explanation":"A neighborhood inside the curve of Interstate 280 west of Mission Street, where many streets carry Native American tribal names such as Onondaga and Seneca; Balboa Park and its BART station occupy its southwest corner.","sources":["wp-list-neighborhoods","wp-excelsior","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Mission Terrace\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72806,"lon":-122.43515,"category":"neighborhood","toleranceKm":0.6,"hint":"Streets named for tribes, by Balboa Park."},{"id":"nh-cayuga-terrace","name":"Cayuga Terrace","tier":5,"explanation":"A pocket of the Outer Mission between Interstate 280 and Mission Street represented by the Cayuga Improvement Association; Cayuga Park sits at its edge, and some treat the area as part of Mission Terrace.","sources":["wp-outer-mission","wp-cayuga-park","wp-list-neighborhoods","datasf-find-neighborhoods"],"aliases":["Cayuga"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Cayuga\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71962,"lon":-122.44309,"category":"neighborhood","toleranceKm":0.5,"hint":"Cayuga Park, by the Outer Mission."},{"id":"nh-crocker-amazon","name":"Crocker-Amazon","tier":3,"explanation":"Winding streets on the Daly City line south of Geneva Avenue, named for Charles Crocker's former landholdings and nearby Amazon Avenue; Crocker-Amazon Park borders it to the north.","sources":["wp-crocker-amazon"],"aliases":["Crocker Amazon"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Crocker-Amazon, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Park 'adjoins McLaren Park' not in cited source; article says the park borders the neighborhood to the north."}],"kind":"place","map":"sf","lat":37.71282,"lon":-122.43945,"category":"neighborhood","toleranceKm":0.6,"hint":"Between the Excelsior and Daly City."},{"id":"nh-sunnyside","name":"Sunnyside","tier":3,"explanation":"Laid out in 1891 with its own electric streetcar line, it sits north of I-280 beside City College; Monterey Boulevard is its main street and the octagonal 1902 Sunnyside Conservatory is a city landmark.","sources":["wp-list-neighborhoods","wp-sunnyside-conservatory","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Sunnyside\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.73002,"lon":-122.4465,"category":"neighborhood","toleranceKm":0.6,"hint":"Monterey Boulevard, north of City College."},{"id":"nh-diamond-heights","name":"Diamond Heights","tier":3,"explanation":"A redevelopment-era neighborhood built over three hills, Red Rock, Gold Mine and Fairmount, between Noe Valley and Glen Canyon; it was planned to follow the hilly terrain rather than fight it.","sources":["wp-diamond-heights"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Diamond Heights, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.74576,"lon":-122.44164,"category":"neighborhood","toleranceKm":0.6,"hint":"Gold Mine Hill above Glen Canyon."},{"id":"nh-eureka-valley","name":"Eureka Valley","tier":3,"explanation":"The older name for the valley that holds the Castro, once a working-class Irish and Scandinavian district; its residents elected Harvey Milk to the Board of Supervisors in 1977. The Planning Department still calls the larger area Castro/Upper Market.","sources":["wp-eureka-valley","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Eureka Valley\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75824,"lon":-122.43911,"category":"neighborhood","toleranceKm":0.7,"hint":"The valley the Castro sits in."},{"id":"nh-dolores-heights","name":"Dolores Heights","tier":4,"explanation":"Steep streets above the south end of Dolores Park, between the Castro and Noe Valley, so sheer that the J Church streetcar detours through the park and Liberty Hill; many blocks end in stairways.","sources":["wp-list-neighborhoods","wp-dolores-park","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Dolores Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7549,"lon":-122.42673,"category":"neighborhood","toleranceKm":0.5,"hint":"The hill above Dolores Park."},{"id":"nh-mission-dolores","name":"Mission Dolores","tier":3,"explanation":"The city's oldest neighborhood, around the Spanish mission founded in 1776 near the Ohlone villages on Mission Creek; it lies between Market Street, Valencia and 20th in the northwest corner of the Mission.","sources":["wp-mission-dolores","wp-list-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Mission Dolores, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.76424,"lon":-122.42366,"category":"neighborhood","toleranceKm":0.5,"hint":"The 1776 mission church on Dolores Street."},{"id":"nh-corona-heights","name":"Corona Heights","tier":3,"explanation":"A rocky hill above the Castro whose jagged profile is the scar of the Gray Brothers' quarry and brickworks, opened in 1899; the Randall Museum sits on its slope in Corona Heights Park.","sources":["wp-corona-heights","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Corona Heights, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Moved lat/lon from the Wikipedia article coordinate (37.76231,-122.44386), which falls outside the DataSF 'Corona Heights' polygon ~0.5 km SW of the summit, to that polygon's centroid (Nominatim peak 37.76489,-122.43937 is 0.1 km away). Dropped 'red' (not in cited source)."}],"kind":"place","map":"sf","lat":37.76441,"lon":-122.43857,"category":"neighborhood","toleranceKm":0.4,"hint":"Randall Museum on the quarried hill above the Castro."},{"id":"nh-clarendon-heights","name":"Clarendon Heights","tier":4,"explanation":"Hillside homes north of Twin Peaks and east of Mount Sutro, bounded by Clarendon Avenue and reaching down toward Corbett Avenue; Sutro Tower rises just beside it.","sources":["wp-list-neighborhoods","wp-sutro-tower","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Clarendon Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75629,"lon":-122.44871,"category":"neighborhood","toleranceKm":0.5,"hint":"Just below Sutro Tower, toward Market."},{"id":"nh-ashbury-heights","name":"Ashbury Heights","tier":4,"explanation":"The hill immediately south of the Haight, at the foot of Tank Hill, whose park is named for the water tank that once stood there.","sources":["wp-list-neighborhoods","wp-tank-hill","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Ashbury Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.76252,"lon":-122.4491,"category":"neighborhood","toleranceKm":0.4,"hint":"Tank Hill, above the Haight."},{"id":"nh-buena-vista","name":"Buena Vista","tier":4,"explanation":"The slopes around Buena Vista Park, the city's oldest park (1867), whose 575-foot summit looks over the Haight; WPA crews lined its paths with gutters made from broken headstones from the old Lone Mountain cemeteries.","sources":["wp-list-neighborhoods","wp-buena-vista-park","datasf-find-neighborhoods"],"aliases":["Buena Vista Heights"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Buena Vista\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.76789,"lon":-122.44158,"category":"neighborhood","toleranceKm":0.5,"hint":"Headstone gutters in the city's oldest park."},{"id":"nh-little-hollywood","name":"Little Hollywood","tier":4,"explanation":"A pocket around Blanken Avenue between Bayshore Boulevard and Highway 101, developed in the 1920s; the name comes from the Hollywood-style houses first built there, and local legend has Mae West owning a getaway home.","sources":["wp-little-hollywood"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Little Hollywood, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71145,"lon":-122.39843,"category":"neighborhood","toleranceKm":0.4,"hint":"Tiny enclave by the Bayshore Caltrain station."},{"id":"nh-silver-terrace","name":"Silver Terrace","tier":4,"explanation":"A hillside between the Bayview and Portola bounded by Third Street, Silver Avenue and Bayshore Boulevard; the Caltrain line passes beneath it in a tunnel.","sources":["wp-silver-terrace"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Silver Terrace, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7332,"lon":-122.3986,"category":"neighborhood","toleranceKm":0.5,"hint":"Between the Bayview and Portola."},{"id":"nh-india-basin","name":"India Basin","tier":4,"explanation":"A cove on the Bayview shoreline, named for the body of water, that hosted small boatbuilders from about 1870; India Basin Shoreline Park holds the only Natural Area in the city park system that borders the bay.","sources":["wp-india-basin"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (India Basin, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Replaced unsupported 'one of the city's few tidal salt marshes' with the article's Natural Area statement."}],"kind":"place","map":"sf","lat":37.7407,"lon":-122.3822,"category":"neighborhood","toleranceKm":0.6,"hint":"Bayview's shoreline park."},{"id":"nh-hunters-point","name":"Hunters Point","tier":3,"explanation":"The peninsula where a commercial drydock of 1870 grew into the Navy's shipyard from 1940; the components of the first atomic bomb shipped from here in 1945. Closed in 1994, it is a Superfund site slowly being redeveloped.","sources":["wp-hunters-point-shipyard","wp-bayview-hunters-point","datasf-find-neighborhoods"],"aliases":["Hunter's Point"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Hunters Point\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72539,"lon":-122.37207,"category":"neighborhood","toleranceKm":0.9,"hint":"The old naval shipyard."},{"id":"nh-candlestick-point","name":"Candlestick Point","tier":3,"explanation":"The city's southeastern tip, a 170-acre fill meant for a World War II shipyard that became California's first urban state recreation area in 1977. The namesake stadium, home of the Giants and 49ers, stood beside it until 2015.","sources":["wp-candlestick-point","wp-bayview-hunters-point"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Candlestick Point State Recreation Area)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.70965,"lon":-122.38025,"category":"neighborhood","toleranceKm":0.8,"hint":"Where the stadium stood."},{"id":"nh-sunnydale","name":"Sunnydale","tier":4,"explanation":"A Visitacion Valley neighborhood between McLaren Park and the Cow Palace named for Sunnydale Avenue; its housing community, first built as barracks for wartime workers, is home to a largely African American and Pacific Islander community.","sources":["wp-list-neighborhoods","wp-visitacion-valley","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Sunnydale\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.71097,"lon":-122.42009,"category":"neighborhood","toleranceKm":0.5,"hint":"Between McLaren Park and the Cow Palace."},{"id":"nh-university-mound","name":"University Mound","tier":4,"explanation":"A hill north of McLaren Park once proposed as a university site, which is why its north–south streets are named for universities and its cross streets for educators; it holds a large reservoir and Burton High School.","sources":["wp-list-neighborhoods","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"University Mound\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72693,"lon":-122.41809,"category":"neighborhood","toleranceKm":0.5,"hint":"Streets named for universities, above McLaren Park."},{"id":"nh-bayview","name":"Bayview","tier":2,"explanation":"The Third Street corridor south of Evans Avenue, nicknamed Butchertown for its slaughterhouses and home to the 1888 Bayview Opera House; largely Italian and Maltese in the 1950s, it became a center of Black San Francisco.","sources":["wp-list-neighborhoods","wp-bayview-hunters-point","datasf-find-neighborhoods"],"aliases":["The Bayview"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Bayview\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.73311,"lon":-122.38988,"category":"neighborhood","toleranceKm":0.9,"hint":"Third Street and the Opera House."},{"id":"nh-little-russia","name":"Little Russia","tier":4,"explanation":"The stretch of Geary Boulevard between about 17th and 27th avenues where Russian-speaking immigrants have clustered since the 1920s, between the Holy Virgin Cathedral and the old Russian Renaissance restaurant.","sources":["wp-list-neighborhoods","wp-richmond-district"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = Geary Blvd at about 22nd Ave, the midpoint of the 17th–27th Ave span described in the cited articles (no polygon or article coordinate exists)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7807,"lon":-122.4815,"category":"neighborhood","toleranceKm":0.8,"hint":"Geary Boulevard in the Central Richmond."},{"id":"nh-outer-sunset","name":"Outer Sunset","tier":2,"explanation":"The Sunset west of Sunset Boulevard out to Ocean Beach, the foggiest part of San Francisco; its blocks of near-identical stucco houses were largely built by Henry Doelger.","sources":["wp-sunset-district","wp-list-neighborhoods","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Outer Sunset\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.75378,"lon":-122.49547,"category":"neighborhood","toleranceKm":1,"hint":"Last avenues before Ocean Beach."},{"id":"nh-barbary-coast","name":"Barbary Coast","tier":3,"explanation":"The Gold Rush red-light district centered on three blocks of Pacific Street between Montgomery and Stockton, notorious for dance halls, brothels and the kidnapping of sailors that coined the verb 'to shanghai'. Its brothels were finally shut in 1917.","sources":["wp-barbary-coast"],"tags":["historic"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Barbary Coast, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.79656,"lon":-122.40593,"category":"neighborhood","toleranceKm":0.4,"hint":"Pacific Avenue beside Jackson Square."},{"id":"nh-mint-hill","name":"Mint Hill","tier":5,"explanation":"A small rise at Market, Duboce and Hermann streets named for the third San Francisco Mint, dedicated there in 1937, which still strikes collector coins bearing the 'S' mint mark.","sources":["wp-sf-mint","wp-lower-haight","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Mint Hill\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.77114,"lon":-122.42592,"category":"neighborhood","toleranceKm":0.4,"hint":"The 1937 Mint above Market and Duboce."},{"id":"nh-showplace-square","name":"Showplace Square","tier":4,"explanation":"A low-lying district of design showrooms and upscale shops between Townsend and 16th streets west of Mission Bay, also called the Design District; the California College of the Arts' San Francisco campus is here.","sources":["wp-list-neighborhoods","datasf-find-neighborhoods"],"aliases":["Design District"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Showplace Square\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Removed unsupported 'converted warehouses'."}],"kind":"place","map":"sf","lat":37.7692,"lon":-122.40338,"category":"neighborhood","toleranceKm":0.6,"hint":"Design showrooms west of Mission Bay."},{"id":"nh-westwood-park","name":"Westwood Park","tier":4,"explanation":"A 1916 Baldwin & Howell subdivision of Craftsman and Mediterranean bungalows arranged on concentric oval streets beside City College, with street names such as Eastwood and Wildwood.","sources":["wp-westwood-park"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Westwood Park, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.72759,"lon":-122.45822,"category":"neighborhood","toleranceKm":0.4,"hint":"Oval streets of bungalows by City College."},{"id":"nh-sherwood-forest","name":"Sherwood Forest","tier":5,"explanation":"A small pocket on the southwestern slope of Mount Davidson between Dalewood Way and Lansdale Avenue, one of several residence parks grouped around the city's highest hill.","sources":["wp-list-neighborhoods","wp-mount-davidson","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Sherwood Forest\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.73743,"lon":-122.45687,"category":"neighborhood","toleranceKm":0.4,"hint":"Southwest slope of Mount Davidson."},{"id":"nh-monterey-heights","name":"Monterey Heights","tier":5,"explanation":"A small neighborhood on the western slope of Mount Davidson, bounded by Monterey Boulevard to the south and Yerba Buena Avenue to the east.","sources":["wp-list-neighborhoods","datasf-find-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Monterey Heights\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Removed unsupported 'bordering St. Francis Wood'; used the list article's boundaries."}],"kind":"place","map":"sf","lat":37.73306,"lon":-122.46165,"category":"neighborhood","toleranceKm":0.4,"hint":"Above Monterey Boulevard, west of Mount Davidson."},{"id":"nh-lower-pacific-heights","name":"Lower Pacific Heights","tier":3,"explanation":"The Fillmore Street shopping corridor between California and Post streets, long called Upper Fillmore until rising property values in the 1980s and 90s rebranded it as part of Pacific Heights.","sources":["wp-lower-pacific-heights"],"aliases":["Upper Fillmore"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Lower Pacific Heights, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.787,"lon":-122.4335,"category":"neighborhood","toleranceKm":0.5,"hint":"Fillmore Street between Japantown and Pacific Heights."},{"id":"nh-lower-nob-hill","name":"Lower Nob Hill","tier":4,"explanation":"The southern slope of Nob Hill between California and Geary streets, rebuilt after 1906 as a dense district of apartment hotels now on the National Register; its overlap with the Tenderloin earns it the nickname Tendernob.","sources":["wp-lower-nob-hill","wp-list-neighborhoods","wp-nob-hill"],"aliases":["Tendernob"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Lower Nob Hill Apartment Hotel District)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Added Nob Hill source for the 'Tendernob' nickname."}],"kind":"place","map":"sf","lat":37.789,"lon":-122.416,"category":"neighborhood","toleranceKm":0.5,"hint":"Apartment hotels between Nob Hill and the Tenderloin."},{"id":"nh-fishermans-wharf","name":"Fisherman's Wharf","tier":1,"explanation":"A working fishing port along Jefferson Street that declined in the 1960s and 70s as tourism took over; Pier 39's sea lion colony is its best-known draw, and the Aquatic Park historic district is often counted as part of it.","sources":["wp-fishermans-wharf"],"aliases":["Fishermans Wharf","The Wharf"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Fisherman's Wharf, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Tier 2 -> 1."}],"kind":"place","map":"sf","lat":37.80833,"lon":-122.41556,"category":"neighborhood","toleranceKm":0.6,"hint":"Pier 39 sea lions."},{"id":"nh-presidio-terrace","name":"Presidio Terrace","tier":4,"explanation":"A gated oval of 36 mansion lots off Arguello Boulevard, begun in 1905 by Baldwin & Howell as the first master-planned community on the west side; mayors and senators have lived on its single private street.","sources":["wp-presidio-terrace"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Presidio Terrace)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78833,"lon":-122.46056,"category":"neighborhood","toleranceKm":0.4,"hint":"Gated oval street off Arguello."},{"id":"nh-little-saigon","name":"Little Saigon","tier":4,"explanation":"Two blocks of Larkin Street between Turk and O'Farrell officially designated Little Saigon by the city, the historic heart of the Tenderloin's Vietnamese community and its Tết celebrations.","sources":["wp-tenderloin"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = Larkin St between Turk and O'Farrell, the two blocks the Tenderloin article says the city designated Little Saigon"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.7832,"lon":-122.4172,"category":"neighborhood","toleranceKm":0.4,"hint":"Larkin Street in the Tenderloin."},{"id":"nh-mid-market","name":"Mid-Market","tier":3,"explanation":"The stretch of Market Street between Fifth Street and Van Ness lined with former vaudeville palaces such as the Warfield and the Golden Gate; a 2011 'Twitter tax break' drew tech headquarters to its long-struggling blocks.","sources":["wp-mid-market"],"aliases":["Central Market"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Mid-Market, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.78052,"lon":-122.41253,"category":"neighborhood","toleranceKm":0.5,"hint":"The Warfield and the Golden Gate Theatre."},{"id":"nh-merced-manor","name":"Merced Manor","tier":5,"explanation":"A 1930s tract between Stern Grove and Lake Merced marketed as 'The White City' for its pale houses; Lowell High School and the Merced Manor reservoir sit at its edges.","sources":["wp-merced-manor"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (Merced Manor, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.73272,"lon":-122.47856,"category":"neighborhood","toleranceKm":0.5,"hint":"Between Stern Grove and Lowell High."},{"id":"nh-south-park","name":"South Park","tier":3,"explanation":"An oval park and the street that rings it, assembled in 1852 by developer George Gordon as a London-style square between Second and Third, Bryant and Brannan streets.","sources":["wp-south-park","wp-list-neighborhoods"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon from the Wikipedia article coordinates (South Park, San Francisco)"},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts).","note":"Replaced unsupported 'one of the oldest neighborhoods south of Market' with sourced detail on George Gordon's 1852 London-style square."}],"kind":"place","map":"sf","lat":37.78139,"lon":-122.39389,"category":"neighborhood","toleranceKm":0.4,"hint":"Oval park between 2nd and 3rd streets."},{"id":"nh-laguna-honda","name":"Laguna Honda","tier":5,"explanation":"The Forest Hill Extension south of Dewey Boulevard, named for the 'deep lagoon' reservoir at Laguna Honda Boulevard and Clarendon Avenue; Laguna Honda Hospital and the Forest Hill Muni station stand at its corner.","sources":["wp-list-neighborhoods","wp-forest-hill","datasf-find-neighborhoods"],"aliases":["Forest Hill Extension"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Laguna Honda\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.74565,"lon":-122.45798,"category":"neighborhood","toleranceKm":0.5,"hint":"Laguna Honda Hospital."},{"id":"nh-north-waterfront","name":"North Waterfront","tier":4,"explanation":"The piers and former warehouses between the foot of Telegraph Hill and the bay, from about Pier 1 to Pier 33, redeveloped in the 1970s and 80s into offices such as Levi's Plaza; Philo Farnsworth transmitted the first television image at 202 Green Street in 1927.","sources":["wp-list-neighborhoods","datasf-find-neighborhoods"],"aliases":["Northern Waterfront","Northeast Waterfront"],"verification":[{"by":"author:neighborhoods-agent","date":"2026-11-01","method":"authored; coordinates and facts checked against cited source","note":"lat/lon = centroid of the SF Find Neighborhoods polygon \"Northern Waterfront\""},{"by":"verifier:neighborhoods-check","date":"2026-11-01","method":"Re-verified independently: coordinates cross-checked with Nominatim, Wikidata P625 and the DataSF SF Find Neighborhoods polygon; every claim in explanation and hint re-read in the cited articles (Wikipedia API extracts)."}],"kind":"place","map":"sf","lat":37.80143,"lon":-122.40018,"category":"neighborhood","toleranceKm":0.6,"hint":"Levi's Plaza below Telegraph Hill."}]},{"id":"sf-trivia","title":"City Facts & Symbols","subtitle":"Numbers, nicknames and official emblems","description":"The hard facts about San Francisco: how many people, how many square miles, what the flag and seal show, which bird and flower are official, and the stories behind the bridge, the fog and the food. Time-sensitive figures carry an as-of date.","order":90,"accent":"fog","sources":[{"id":"census-2020-pl-p2","title":"2020 Census Redistricting Data (P.L. 94-171), Table P2: Hispanic or Latino, and Not Hispanic or Latino by Race — San Francisco County, California","url":"https://data.census.gov/table/DECENNIALPL2020.P2?g=050XX00US06075","publisher":"U.S. Census Bureau","accessed":"2026-11-01","note":"Total 873,965; Hispanic 136,761 (15.6%); White alone NH 341,306 (39.1%); Asian alone NH 294,220 (33.7%); Black alone NH 45,071 (5.2%). Retrieved via data.census.gov table API."},{"id":"census-gazetteer-2020","title":"2020 Gazetteer Files — Counties (national)","url":"https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2020_Gazetteer/2020_Gaz_counties_national.zip","publisher":"U.S. Census Bureau","accessed":"2026-11-01","note":"San Francisco County: land 121,507,089 m² = 46.914 sq mi; water 185.0 sq mi."},{"id":"census-acs-2024-b19013","title":"ACS 2024 1-Year Estimates, Table B19013: Median Household Income — San Francisco County, California","url":"https://data.census.gov/table/ACSDT1Y2024.B19013?g=050XX00US06075","publisher":"U.S. Census Bureau","accessed":"2026-11-01","note":"B19013_001E = 139,801 (±6,180)."},{"id":"datasf-analysis-neighborhoods","title":"Analysis Neighborhoods","url":"https://data.sf.gov/Geographic-Locations-and-Boundaries/Analysis-Neighborhoods/p5b7-5n3h","publisher":"DataSF","accessed":"2026-11-01","note":"41 neighborhoods created by DPH and MOHCD with Planning support by grouping 2010 census tracts."},{"id":"wp-san-francisco","title":"San Francisco","url":"https://en.wikipedia.org/wiki/San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-history-sf","title":"History of San Francisco","url":"https://en.wikipedia.org/wiki/History_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-government-sf","title":"Government of San Francisco","url":"https://en.wikipedia.org/wiki/Government_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-nicknames-sf","title":"Nicknames of San Francisco","url":"https://en.wikipedia.org/wiki/Nicknames_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-flag-sf","title":"Flag of San Francisco","url":"https://en.wikipedia.org/wiki/Flag_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-seal-sf","title":"Seal of San Francisco","url":"https://en.wikipedia.org/wiki/Seal_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"sf-admin-code-ch1","title":"San Francisco Administrative Code, Chapter 1 — General Provisions (Secs. 1.5 to 1.5-5: official flower, song and ballad, colors, bird, band, animal)","url":"https://gocodebook.com/library/us/ca/san-francisco-admin/chapter-1-general-provisions/sec.-1.5.-official-flower-designated","publisher":"GoCodebook (mirror of the SF Administrative Code)","accessed":"2026-11-01","note":"Official amlegal.com code library returned 403 to automated fetch; mirror used. Dahlia (Reso. 26244); song 'San Francisco' and ballad 'I Left My Heart in San Francisco' (Ord. 307-69); colors black and gold (Ord. 93-79); California quail (Ord. 246-00); SF Lesbian/Gay Freedom Band (Ord. 297-18); wild parrot (Ord. 124-23)."},{"id":"baynature-quail","title":"California Quail Named Official Bird of City of San Francisco","url":"https://baynature.org/article/california-quail-named-official-bird-of-city-of-san-francisco/","publisher":"Bay Nature (July 2001)","accessed":"2026-11-01"},{"id":"sfstandard-accordion","title":"Why the accordion is San Francisco's official instrument","url":"https://sfstandard.com/arts-culture/san-francisco-italian-festival-accordion","publisher":"The San Francisco Standard (May 24, 2023)","accessed":"2026-11-01","note":"Credits Tom Torriglia with the campaign and gives 1992; a 7x7 column gives 1990. Year not confirmed in Board records."},{"id":"7x7-official-instrument","title":"The Official Musical Instrument of San Francisco (and Other Lesser-Known Facts)","url":"https://www.7x7.com/the-official-musical-instrument-of-san-francisco-and-other-lesser-know-1786561765.html","publisher":"7x7","accessed":"2026-11-01"},{"id":"wp-mount-davidson","title":"Mount Davidson (California)","url":"https://en.wikipedia.org/wiki/Mount_Davidson_(California)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-twin-peaks","title":"Twin Peaks (San Francisco)","url":"https://en.wikipedia.org/wiki/Twin_Peaks_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-hills-sf","title":"List of hills in San Francisco","url":"https://en.wikipedia.org/wiki/List_of_hills_in_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-cable-car","title":"San Francisco cable car system","url":"https://en.wikipedia.org/wiki/San_Francisco_cable_car_system","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-ggb","title":"Golden Gate Bridge","url":"https://en.wikipedia.org/wiki/Golden_Gate_Bridge","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"ggb-stats","title":"Golden Gate Bridge — Design & Construction Statistics","url":"https://www.goldengate.org/bridge/history-research/statistics-data/design-construction-stats/","publisher":"Golden Gate Bridge Highway & Transportation District","accessed":"2026-11-01"},{"id":"ggb-color","title":"Golden Gate Bridge — Color & Art Deco Styling","url":"https://www.goldengate.org/bridge/history-research/bridge-features/color-art-deco-styling/","publisher":"Golden Gate Bridge Highway & Transportation District","accessed":"2026-11-01"},{"id":"ggb-foghorns","title":"Golden Gate Bridge — Foghorns & Beacons","url":"https://www.goldengate.org/bridge/history-research/bridge-features/foghorns-beacons/","publisher":"Golden Gate Bridge Highway & Transportation District","accessed":"2026-11-01"},{"id":"wp-salesforce-tower","title":"Salesforce Tower","url":"https://en.wikipedia.org/wiki/Salesforce_Tower","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mission-dolores","title":"Mission San Francisco de Asís","url":"https://en.wikipedia.org/wiki/Mission_San_Francisco_de_As%C3%ADs","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-karl-the-fog","title":"Karl the Fog","url":"https://en.wikipedia.org/wiki/Karl_the_Fog","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-painted-ladies","title":"Painted ladies","url":"https://en.wikipedia.org/wiki/Painted_ladies","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-lombard","title":"Lombard Street (San Francisco)","url":"https://en.wikipedia.org/wiki/Lombard_Street_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-alcatraz","title":"Alcatraz Island","url":"https://en.wikipedia.org/wiki/Alcatraz_Island","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-pier-39","title":"Pier 39","url":"https://en.wikipedia.org/wiki/Pier_39","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-ggpark","title":"Golden Gate Park","url":"https://en.wikipedia.org/wiki/Golden_Gate_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-central-park","title":"Central Park","url":"https://en.wikipedia.org/wiki/Central_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sutro-tower","title":"Sutro Tower","url":"https://en.wikipedia.org/wiki/Sutro_Tower","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-castro-theatre","title":"Castro Theatre","url":"https://en.wikipedia.org/wiki/Castro_Theatre","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-oracle-park","title":"Oracle Park","url":"https://en.wikipedia.org/wiki/Oracle_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-49ers","title":"San Francisco 49ers","url":"https://en.wikipedia.org/wiki/San_Francisco_49ers","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-chase-center","title":"Chase Center","url":"https://en.wikipedia.org/wiki/Chase_Center","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"sfmta-history","title":"Muni History","url":"https://www.sfmta.com/node/1378","publisher":"SFMTA","accessed":"2026-11-01"},{"id":"wp-muni","title":"San Francisco Municipal Railway","url":"https://en.wikipedia.org/wiki/San_Francisco_Municipal_Railway","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-bart","title":"Bay Area Rapid Transit","url":"https://en.wikipedia.org/wiki/Bay_Area_Rapid_Transit","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-bay-to-breakers","title":"Bay to Breakers","url":"https://en.wikipedia.org/wiki/Bay_to_Breakers","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-chinatown","title":"Chinatown, San Francisco","url":"https://en.wikipedia.org/wiki/Chinatown,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-japantown","title":"Japantown","url":"https://en.wikipedia.org/wiki/Japantown","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-japantown-sf","title":"Japantown, San Francisco","url":"https://en.wikipedia.org/wiki/Japantown,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"sfgov-budget-2025","title":"Mayor Lurie Signs Balanced, Responsible Budget Driving San Francisco's Recovery (July 24, 2025)","url":"https://www.sf.gov/news-mayor-lurie-signs-balanced-responsible-budget-driving-san-franciscos-recovery","publisher":"City and County of San Francisco","accessed":"2026-11-01"},{"id":"cbs-osaka-sister-city","title":"Breed Defends 'Comfort Women' Memorial After Osaka Cuts Sister City Ties (Oct. 5, 2018)","url":"https://www.cbsnews.com/sanfrancisco/news/breed-defends-comfort-women-memorial-osaka-cuts-sister-city-ties/","publisher":"CBS News Bay Area","accessed":"2026-11-01","note":"States the affiliation was formed Oct. 7, 1957. No official sf.gov sister-city list was reachable."},{"id":"wp-area-code-415","title":"Area codes 415 and 628","url":"https://en.wikipedia.org/wiki/Area_codes_415_and_628","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-boudin","title":"Boudin Bakery","url":"https://en.wikipedia.org/wiki/Boudin_Bakery","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-sourdough-bacterium","title":"Fructilactobacillus sanfranciscensis","url":"https://en.wikipedia.org/wiki/Fructilactobacillus_sanfranciscensis","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-mission-burrito","title":"Mission burrito","url":"https://en.wikipedia.org/wiki/Mission_burrito","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-irish-coffee","title":"Irish coffee","url":"https://en.wikipedia.org/wiki/Irish_coffee","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-its-it","title":"It's-It Ice Cream","url":"https://en.wikipedia.org/wiki/It%27s-It_Ice_Cream","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-anchor","title":"Anchor Brewing Company","url":"https://en.wikipedia.org/wiki/Anchor_Brewing_Company","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-palou","title":"Francisco Palóu","url":"https://en.wikipedia.org/wiki/Francisco_Pal%C3%B3u","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wp-presidio","title":"Presidio of San Francisco","url":"https://en.wikipedia.org/wiki/Presidio_of_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"census-api-pl2020-p2","title":"2020 Census P2 (Hispanic or Latino, and Not Hispanic or Latino by Race), San Francisco County — data.census.gov table API","url":"https://data.census.gov/api/access/data/table?id=DECENNIALPL2020.P2&g=050XX00US06075","publisher":"US Census Bureau","accessed":"2026-11-01","note":"JSON: P2_001N 873,965; P2_002N 136,761; P2_005N 341,306; P2_006N 45,071; P2_008N 294,220."},{"id":"census-api-acs2024-b19013","title":"ACS 2024 1-year B19013 Median Household Income, San Francisco County — data.census.gov table API","url":"https://data.census.gov/api/access/data/table?id=ACSDT1Y2024.B19013&g=050XX00US06075","publisher":"US Census Bureau","accessed":"2026-11-01","note":"JSON: B19013_001E 139,801; margin of error 6,180."},{"id":"datasf-analysis-neighborhoods-meta","title":"Analysis Neighborhoods — dataset metadata (Socrata API)","url":"https://data.sf.gov/api/views/p5b7-5n3h.json","publisher":"DataSF","accessed":"2026-11-01","note":"Description states DPH and MOHCD created these 41 neighborhoods; row count is 41."},{"id":"sfmuseum-mission-dolores-founding","title":"Founding of the Mission Dolores – 1776","url":"https://sfmuseum.org/hist5/misdolor.html","publisher":"Virtual Museum of the City of San Francisco","accessed":"2026-11-01","note":"Quotes Palóu's account of the first Mass on June 29, 1776, feast of Sts Peter and Paul."},{"id":"wp-sf-tallest","title":"List of tallest buildings in San Francisco","url":"https://en.wikipedia.org/wiki/List_of_tallest_buildings_in_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"}],"items":[{"id":"triv-population-2020","name":"873,965","tier":2,"explanation":"The official April 1, 2020 count was 873,965, making San Francisco the fourth-largest city in California after Los Angeles, San Diego and San José. Census Bureau estimates show the city lost residents during the pandemic years.","sources":["census-2020-pl-p2","wp-san-francisco","census-api-pl2020-p2"],"tags":["numbers","census"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Pulled the table from the data.census.gov table API (JSON) and recomputed shares. P2_001N = 873,965; Wikipedia confirms fourth-most-populous in California and a lower 2025 estimate."}],"kind":"fact","question":"What was San Francisco's population in the 2020 Census?","distractors":["1,023,418","749,312","612,880"],"asOf":"2020-04-01"},{"id":"triv-land-area","name":"46.9 square miles","tier":2,"explanation":"The Census Bureau measures 46.9 square miles of land. The city's legal boundary also includes about 185 square miles of bay and ocean, which is why the total area is often quoted as 232 square miles.","sources":["census-gazetteer-2020","wp-san-francisco"],"tags":["numbers","geography"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Downloaded the 2020 Census Gazetteer counties file: ALAND_SQMI 46.914, AWATER_SQMI 185.0 for GEOID 06075; Wikipedia confirms ~232 sq mi total."}],"kind":"fact","question":"What is the land area of the City and County of San Francisco (excluding water)?","distractors":["49.0 square miles","52.3 square miles","38.5 square miles"]},{"id":"triv-seven-by-seven","name":"Its roughly seven-mile-by-seven-mile square shape","tier":1,"explanation":"The mainland city is roughly a seven-by-seven-mile square, hence '7x7' and the folk figure of '49 square miles'. Measured precisely, the land area is 46.9 square miles.","sources":["wp-san-francisco","census-gazetteer-2020"],"tags":["nicknames"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia San Francisco article (\"seven-by-seven-mile square\" colloquialism, ~232 sq mi total) and 2020 Gazetteer land area 46.914 sq mi."}],"kind":"fact","question":"The nickname '7x7' for San Francisco refers to what?","distractors":["Its seven hills and seven bridges","Its original seven supervisorial districts","The seven-mile, seven-lane Market Street"]},{"id":"triv-flag-phoenix","name":"A phoenix rising from flames","tier":1,"explanation":"The phoenix has been a civic symbol since the first city seal of 1852, long before the 1906 earthquake and fire that it is often assumed to commemorate. The current flag design was codified in 1940.","sources":["wp-flag-sf"],"tags":["symbols"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Flag of San Francisco: phoenix on first seal 1852; current design codified by Board of Supervisors 16 Dec 1940."}],"kind":"fact","question":"What is the central image on the flag of San Francisco?","distractors":["A golden grizzly bear","A cable car on a hill","The Golden Gate at sunset"]},{"id":"triv-motto","name":"Gold in Peace, Iron in War","tier":2,"explanation":"The Spanish motto appears on the seal and on the flag's ribbon. It is usually tied to the city's role as the embarkation point for troops in the 1898 Spanish–American War, and the official colors of black and gold (Admin. Code Sec. 1.5-2, 1979) were taken from it.","sources":["wp-flag-sf","wp-seal-sf","sf-admin-code-ch1"],"tags":["symbols"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia flag and seal articles for the wording, translation and 1898 link; Admin. Code Sec. 1.5-2 (Ord. 93-79) text for the official colors."}],"kind":"fact","question":"What does the city motto 'Oro en Paz, Fierro en Guerra' mean?","distractors":["Gold for Peace, Iron for Freedom","Rich in Peace, Strong in War","Gold in the Hills, Iron in the Sea"]},{"id":"triv-seal-figures","name":"A miner and a sailor","tier":3,"explanation":"The 1859 seal shows a Gold Rush miner with a shovel and a sailor with a sextant beside a shield depicting a steamship entering the Golden Gate, with a phoenix above and a plow and anchor below for commerce and navigation.","sources":["wp-seal-sf"],"tags":["symbols"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Seal of San Francisco: 1859 seal, miner with shovel and sailor with sextant, steamship through the Golden Gate, phoenix crest, plow and anchor."}],"kind":"fact","question":"Which two figures flank the shield on the seal of San Francisco?","distractors":["A friar and a soldier","A grizzly bear and an eagle","A firefighter and a railroad worker"]},{"id":"triv-official-bird","name":"California quail","tier":3,"explanation":"The Board of Supervisors adopted the California quail by ordinance in 2000 (Admin. Code Sec. 1.5-3). Ironically the bird has nearly vanished from the city; Golden Gate Park's population fell from roughly 1,500 around 1900 to a handful.","sources":["sf-admin-code-ch1","baynature-quail"],"tags":["symbols","nature"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Admin. Code Sec. 1.5-3 text (Ord. 246-00, approved 27 Oct 2000) via gocodebook; Bay Nature article for the 1,500-to-a-handful decline in Golden Gate Park."}],"kind":"fact","question":"What is the official bird of the City and County of San Francisco?","distractors":["Western gull","Anna's hummingbird","Red-tailed hawk"]},{"id":"triv-official-flower","name":"Dahlia","tier":3,"explanation":"The dahlia was designated by Board resolution (Admin. Code Sec. 1.5); the official bird, colors, song and ballad are set in the same chapter of the code.","sources":["sf-admin-code-ch1"],"tags":["symbols","nature"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Admin. Code Sec. 1.5 text (\"The Dahlia is hereby designated the official flower\", Reso. No. 26244) via gocodebook; Secs. 1.5-1 to 1.5-4 confirm song, ballad, colors, bird and band sit in the same chapter."}],"kind":"fact","question":"What is San Francisco's official flower?","distractors":["California poppy","Rose","Calla lily"]},{"id":"triv-official-song","name":"San Francisco","tier":3,"explanation":"A 1969 ordinance named 'San Francisco' — written by Bronislau Kaper and Walter Jurmann with lyrics by Gus Kahn for the 1936 film — the official song, and Tony Bennett's 'I Left My Heart in San Francisco' the official ballad (Admin. Code Sec. 1.5-1).","sources":["sf-admin-code-ch1"],"tags":["symbols","music"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Admin. Code Sec. 1.5-1 text (Ord. 307-69, approved 24 Oct 1969; amended 1984): \"San Francisco\" (Kaper/Jurmann/Kahn) official song; \"I Left My Heart in San Francisco\" official ballad."}],"kind":"fact","question":"Which song is the city's official song (as distinct from its official ballad)?","distractors":["I Left My Heart in San Francisco","San Francisco (Be Sure to Wear Flowers in Your Hair)","Lights"]},{"id":"triv-official-ballad","name":"I Left My Heart in San Francisco","tier":2,"explanation":"Written by George Cory and Douglass Cross and made famous by Tony Bennett in 1962, the song was designated the official ballad in 1969 (Admin. Code Sec. 1.5-1).","sources":["sf-admin-code-ch1"],"tags":["symbols","music"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Admin. Code Sec. 1.5-1 text (Ord. 307-69, 1969) via gocodebook; Cory/Cross authorship stated in the code."}],"kind":"fact","question":"What is San Francisco's official ballad?","distractors":["San Francisco","Lights","(Sittin' On) The Dock of the Bay"]},{"id":"triv-official-instrument","name":"The accordion","tier":4,"explanation":"Accordionist Tom Torriglia lobbied the Board of Supervisors to honor the instrument, a nod to the city's Italian North Beach heritage. Accounts differ on whether the designation dates to 1990 or 1992.","sources":["sfstandard-accordion","7x7-official-instrument"],"tags":["symbols","music"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Secondary sources only: SF Standard (2024, says 1992) and 7x7 list agree the accordion is the official instrument; Torriglia interviews found via web search say 1990. The designation is NOT in Admin. Code Chapter 1 (which lists flag, flower, song/ballad, colors, bird, band), so it rests on a Board resolution I could not retrieve.","note":"Explanation already flags the 1990/1992 discrepancy."}],"kind":"fact","question":"What is San Francisco's official musical instrument?","distractors":["The piano","The banjo","The saxophone"]},{"id":"triv-consolidated","name":"A consolidated city and county","tier":1,"explanation":"Since 1856 the city and county have been a single government, with one mayor and one Board of Supervisors; San Francisco is the only consolidated city-county in California. Every other California city sits inside a separate county.","sources":["wp-government-sf","wp-history-sf"],"tags":["government"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Government of San Francisco (\"only consolidated city-county in California\") and History of San Francisco (1856 consolidation).","note":"Removed unsupported \"mayor is also the county executive\" and the council/board-of-supervisors dual-role sentence."}],"kind":"fact","question":"San Francisco is the only one of these in California — which?","distractors":["A city without a county","A county with two incorporated cities","A federal district"]},{"id":"triv-incorporated","name":"1850","tier":2,"explanation":"The city was incorporated on April 15, 1850, five months before California became a state. The settlement had been renamed from Yerba Buena to San Francisco only in January 1847.","sources":["wp-san-francisco","wp-history-sf"],"tags":["history"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia San Francisco infobox: incorporated April 15, 1850 (cites city source); renamed from Yerba Buena 30 Jan 1847 in article text; statehood 9 Sep 1850."}],"kind":"fact","question":"In what year was San Francisco incorporated as a city?","distractors":["1835","1847","1856"]},{"id":"triv-city-birthday","name":"June 29, 1776","tier":3,"explanation":"The city dates its founding to June 29, 1776, the feast of Saints Peter and Paul, when Franciscan Francisco Palóu celebrated the first Mass at the future Mission Dolores — five days before the Declaration of Independence. The Presidio was formally established that September.","sources":["sfmuseum-mission-dolores-founding","wp-san-francisco","wp-presidio","wp-palou"],"tags":["history"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"sfmuseum.org reproduction of Palóu's account (first Mass June 29, feast of Sts Peter and Paul; 'five days before the Declaration of Independence'); Wikipedia San Francisco (June 29, 1776) and Presidio (established 17 Sep 1776).","note":"Replaced the irrelevant 7x7 source; Wikipedia Palóu article gives June 28 for the Mass, so the explanation now credits Palóu alone and follows his own account."}],"kind":"fact","question":"What date is celebrated as San Francisco's birthday?","distractors":["April 15, 1850","January 30, 1847","September 9, 1850"]},{"id":"triv-highest-point","name":"Mount Davidson","tier":2,"explanation":"Mount Davidson rises to 928 feet, a few feet above Twin Peaks (about 925 feet). The 103-foot concrete cross at its summit was dedicated in 1934.","sources":["wp-mount-davidson","wp-twin-peaks"],"tags":["geography"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Mount Davidson (928 ft; 103-ft concrete cross lit 24 Mar 1934) and Twin Peaks (~925 ft, second and third highest)."}],"kind":"fact","question":"What is the highest natural point in San Francisco?","distractors":["Twin Peaks","Mount Sutro","Telegraph Hill"]},{"id":"triv-hills-count","name":"More than 50","tier":3,"explanation":"Counts vary by definition: a classic Chronicle series cataloged 42, later lists reach 43 or more, and Wikipedia puts it at more than 50. The 'seven hills' are Telegraph, Nob, Russian, Rincon, Twin Peaks, Mount Davidson and either Lone Mountain or Mount Sutro.","sources":["wp-san-francisco","wp-hills-sf"],"tags":["geography"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia San Francisco (\"more than 50 hills\") and List of hills (Chronicle series of 42, Hansen almanac 43, seven-hills list)."}],"kind":"fact","question":"The city is famous for 'seven hills' — but roughly how many hills does San Francisco actually have?","distractors":["Exactly 7","About 20","More than 200"]},{"id":"triv-cable-car-lines","name":"3","tier":1,"explanation":"Powell–Mason, Powell–Hyde and California Street are all that remain of 23 lines built between 1873 and 1890. It is the world's last manually operated cable car system.","sources":["wp-cable-car"],"tags":["transit"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia cable car article: 23 lines 1873–1890, three remain (Powell–Mason, Powell–Hyde, California); world's last manually operated system."}],"kind":"fact","question":"How many cable car lines operate in San Francisco today?","distractors":["1","5","8"],"asOf":"2026-11-01"},{"id":"triv-cable-car-landmark","name":"The world's last manually operated cable car system","tier":2,"explanation":"Gripmen still clamp onto a moving underground cable by hand. The system was designated a National Historic Landmark in 1964, one of only two street railways with that status.","sources":["wp-cable-car"],"tags":["transit"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia cable car article: last manually operated system; NHL designated 29 Jan 1964 (infobox); one of two street railways with NHL status."}],"kind":"fact","question":"What distinction does San Francisco's cable car system hold?","distractors":["The oldest operating subway in the Americas","The only funicular in the United States","The first electric streetcar line in the world"]},{"id":"triv-ggb-span","name":"4,200 feet","tier":2,"explanation":"At 4,200 feet (1,280 m) it was the longest suspension span in the world when the bridge opened in 1937. The towers rise 746 feet above the water.","sources":["ggb-stats","wp-ggb"],"tags":["landmarks","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"goldengate.org design/construction stats page: main span 4,200 ft (1,280 m); towers 746 ft; Wikipedia confirms longest span until 1964."}],"kind":"fact","question":"How long is the main span of the Golden Gate Bridge (tower to tower)?","distractors":["2,800 feet","5,900 feet","8,980 feet"]},{"id":"triv-ggb-color","name":"International Orange","tier":1,"explanation":"Consulting architect Irving Morrow chose International Orange after being inspired by the red-lead primer on the steel; it blends with the Marin hills and stands out against the ocean and sky.","sources":["ggb-color","wp-ggb"],"tags":["landmarks"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"goldengate.org color page: Morrow, red lead primer, blends with hills and contrasts with ocean and sky.","note":"Replaced unsupported \"stands out against fog\" with the source's wording."}],"kind":"fact","question":"What is the official name of the Golden Gate Bridge's color?","distractors":["Golden Gate Red","Pacific Vermilion","Safety Orange"]},{"id":"triv-ggb-opened","name":"1937","tier":1,"explanation":"The bridge opened to the public on May 27, 1937, after four years of construction under chief engineer Joseph Strauss.","sources":["wp-ggb"],"tags":["landmarks","history"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia: opened to public 27 May 1937; construction began 5 Jan 1933; Joseph Strauss chief engineer."}],"kind":"fact","question":"In what year did the Golden Gate Bridge open?","distractors":["1927","1933","1941"]},{"id":"triv-ggb-foghorns","name":"5","tier":4,"explanation":"Three horns sit below the roadway at mid-span and two on the south tower pier. Bridge workers switch them on by hand when fog closes in; they sound about two and a half hours a day on average, far more in summer.","sources":["ggb-foghorns"],"tags":["landmarks","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"goldengate.org foghorns page: three horns below the roadway at mid-span, two on the south tower pier (total five); manually switched by bridge workers; about 2.5 hours a day on average, over five hours a day in summer."}],"kind":"fact","question":"How many foghorns are mounted on the Golden Gate Bridge?","distractors":["2","3","8"]},{"id":"triv-tallest-building","name":"Salesforce Tower","tier":1,"explanation":"Salesforce Tower reaches 1,070 feet (326 m) over 61 floors and opened in 2018 (first tenants moved in that January), taking the title of the city's tallest from the Transamerica Pyramid, which had held it since 1972.","sources":["wp-salesforce-tower","wp-sf-tallest"],"tags":["landmarks"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Salesforce Tower (1,070 ft, 61 floors, 2018, highest_prev Transamerica Pyramid) and List of tallest buildings in San Francisco (Transamerica Pyramid 1972).","note":"Replaced unsourced \"45-year reign\" with the sourced 1972 date."}],"kind":"fact","question":"What is the tallest building in San Francisco?","distractors":["Transamerica Pyramid","181 Fremont","555 California Street"],"asOf":"2026-11-01"},{"id":"triv-oldest-building","name":"Mission Dolores chapel","tier":2,"explanation":"The adobe chapel of Mission San Francisco de Asís was completed in 1791 and survived the 1906 earthquake. The larger basilica beside it dates from 1918.","sources":["wp-mission-dolores"],"tags":["landmarks","history"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Mission San Francisco de Asís: oldest intact structure in SF; adobe chapel completed 1791; basilica 1918; adobe damaged but survived 1906."}],"kind":"fact","question":"What is the oldest intact building in San Francisco?","distractors":["The Presidio Officers' Club","The Old Mint","Fort Point"]},{"id":"triv-karl-the-fog","name":"Karl","tier":1,"explanation":"An anonymous Twitter account launched in 2010 speaks for the fog as 'Karl', a name taken from the misunderstood giant in the film 'Big Fish'.","sources":["wp-karl-the-fog"],"tags":["nicknames","weather"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Karl the Fog: anonymous Twitter account begun 2010; named for the giant in Big Fish."}],"kind":"fact","question":"San Francisco's fog has a social-media persona. What is its name?","distractors":["Walter","Gus","Morty"]},{"id":"triv-painted-ladies-location","name":"Steiner Street at Alamo Square","tier":1,"explanation":"The seven Victorians at 710–720 Steiner Street were built by Matthew Kavanaugh in 1892–96. The term 'painted ladies' comes from a 1978 book on the city's multicolored Victorians.","sources":["wp-painted-ladies"],"tags":["landmarks"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Painted ladies: 710–720 Steiner across from Alamo Square, built 1892–96 by Matthew Kavanaugh, \"Postcard Row\"; term from the 1978 book."}],"kind":"fact","question":"Where is 'Postcard Row', the most photographed group of Painted Ladies?","distractors":["Haight Street at Buena Vista Park","Fillmore Street at Lafayette Park","Liberty Street in the Mission"]},{"id":"triv-lombard-turns","name":"8","tier":1,"explanation":"The switchbacks between Hyde and Leavenworth on Russian Hill were built in 1922 to make the steep block passable for cars. Vermont Street on Potrero Hill, with seven turns, is arguably more crooked.","sources":["wp-lombard"],"tags":["landmarks","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Lombard Street: eight hairpin turns between Hyde and Leavenworth, built 1922; Vermont Street seven turns but steeper."}],"kind":"fact","question":"How many hairpin turns does the famous block of Lombard Street have?","distractors":["5","7","12"]},{"id":"triv-the-rock","name":"Alcatraz","tier":1,"explanation":"Alcatraz held a federal penitentiary from 1934 to 1963 and was occupied by Native American activists from 1969 to 1971. It has the oldest operating lighthouse on the West Coast and is now part of the national recreation area.","sources":["wp-alcatraz"],"tags":["landmarks"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Alcatraz Island: federal penitentiary 1934–1963; occupation Nov 1969 – 1971; oldest operating West Coast lighthouse; part of GGNRA since 1972; \"The Rock\" usage."}],"kind":"fact","question":"'The Rock' is the nickname of which island in San Francisco Bay?","distractors":["Angel Island","Yerba Buena Island","Treasure Island"]},{"id":"triv-sea-lions-arrival","name":"1989","tier":2,"explanation":"The first sea lions appeared at Pier 39 in September 1989 — just before, not after, the Loma Prieta earthquake. Numbers peaked at about 1,700 in 2009 and still run into the hundreds or more in season.","sources":["wp-pier-39"],"tags":["nature"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Pier 39: first hauled out September 1989, before the earthquake; 1,700 reported Thanksgiving week 2009.","note":"Removed unsupported \"K-Dock\" detail."}],"kind":"fact","question":"When did sea lions begin hauling out at Pier 39?","distractors":["1978","1995","2003"]},{"id":"triv-ggpark-vs-central-park","name":"About 20% larger","tier":2,"explanation":"Golden Gate Park covers 1,017 acres to Central Park's 843. It was laid out from 1870 on sand dunes by William Hammond Hall and runs more than three miles from the Panhandle to Ocean Beach.","sources":["wp-ggpark","wp-central-park"],"tags":["parks","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Golden Gate Park (1,017 acres; opened 1870; William Hammond Hall; over three miles long) and Central Park (843 acres); 1,017/843 = 1.21."}],"kind":"fact","question":"How does Golden Gate Park compare in size to New York's Central Park?","distractors":["About the same size","About half the size","About twice the size"]},{"id":"triv-sutro-tower-height","name":"977 feet","tier":3,"explanation":"The three-pronged broadcast tower between Twin Peaks and Mount Sutro stands 977 feet (298 m) and began transmitting on July 4, 1973. It was built because the hills blocked TV reception across the city.","sources":["wp-sutro-tower"],"tags":["landmarks","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Sutro Tower: 977 ft (297.8 m); first transmissions 4 July 1973; hills blocked reception; between Twin Peaks and Mount Sutro."}],"kind":"fact","question":"How tall is Sutro Tower?","distractors":["746 feet","1,070 feet","1,250 feet"]},{"id":"triv-castro-theatre-architect","name":"Timothy Pflueger","tier":3,"explanation":"Pflueger's Spanish Baroque movie palace is San Francisco Landmark No. 100. After a $41 million renovation by Another Planet Entertainment it reopened as a concert and film venue in February 2026.","sources":["wp-castro-theatre"],"tags":["landmarks"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Castro Theatre: Pflueger, opened 22 June 1922, Landmark #100 (1976), Another Planet $41M renovation, reopened 6 Feb 2026."}],"kind":"fact","question":"Who designed the Castro Theatre, opened in 1922?","distractors":["Julia Morgan","Willis Polk","Bernard Maybeck"]},{"id":"triv-giants-ballpark","name":"Oracle Park","tier":1,"explanation":"The China Basin ballpark opened in 2000 as Pacific Bell Park, then became SBC Park and AT&T Park before Oracle bought the naming rights in 2019. Home runs over the right-field wall land in McCovey Cove.","sources":["wp-oracle-park"],"tags":["sports"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Oracle Park: opened 31 Mar 2000 as Pacific Bell Park; SBC Park 2004; AT&T Park 2006; Oracle 2019; McCovey Cove in China Basin."}],"kind":"fact","question":"What is the name of the San Francisco Giants' waterfront ballpark?","distractors":["AT&T Park","Candlestick Park","Chase Center"],"asOf":"2026-11-01"},{"id":"triv-49ers-name","name":"The Gold Rush prospectors of 1849","tier":1,"explanation":"The team, founded in 1946, takes its name from the fortune-seekers who flooded into California in 1849. The 49ers have played at Levi's Stadium in Santa Clara since 2014.","sources":["wp-49ers"],"tags":["sports"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia San Francisco 49ers: named after Gold Rush prospectors; founded 1946; Levi's Stadium in Santa Clara since 2014."}],"kind":"fact","question":"The San Francisco 49ers are named after what?","distractors":["The city's 49 square miles","State Route 49","The 49-star US flag"]},{"id":"triv-warriors-arena","name":"Chase Center","tier":1,"explanation":"The Warriors moved from Oakland to Chase Center in Mission Bay in September 2019. The arena seats 18,064 for basketball.","sources":["wp-chase-center"],"tags":["sports"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Chase Center: Mission Bay; opened 6 Sep 2019; seats 18,064; Warriors moved from Oakland Arena."}],"kind":"fact","question":"Where do the Golden State Warriors play their home games?","distractors":["Oracle Arena","Cow Palace","Bill Graham Civic Auditorium"],"asOf":"2026-11-01"},{"id":"triv-asian-share-2020","name":"About 34%","tier":2,"explanation":"The count was 294,220 people, or 33.7% of 873,965. San Francisco has one of the highest Asian American shares of any major US city, rooted in Chinatown's 1850s origins.","sources":["census-2020-pl-p2","census-api-pl2020-p2"],"tags":["census","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Pulled the table from the data.census.gov table API (JSON) and recomputed shares. 294,220 / 873,965 = 33.66%."}],"kind":"fact","question":"In the 2020 Census, roughly what share of San Franciscans identified as Asian (alone, not Hispanic)?","distractors":["About 20%","About 45%","About 55%"],"asOf":"2020-04-01"},{"id":"triv-white-share-2020","name":"About 39%","tier":3,"explanation":"341,306 residents (39.1%) were White alone and not Hispanic or Latino. Hispanic or Latino residents of any race made up 15.6% and Black residents 5.2%.","sources":["census-2020-pl-p2","census-api-pl2020-p2"],"tags":["census","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Pulled the table from the data.census.gov table API (JSON) and recomputed shares. 341,306 / 873,965 = 39.05%; Hispanic 136,761 = 15.65%; Black NH 45,071 = 5.16%."}],"kind":"fact","question":"In the 2020 Census, roughly what share of San Franciscans were non-Hispanic White?","distractors":["About 25%","About 50%","About 60%"],"asOf":"2020-04-01"},{"id":"triv-median-household-income","name":"About $140,000","tier":3,"explanation":"The Census Bureau's 2024 American Community Survey one-year estimate is $139,801 (margin of error about $6,200). The figure is a median: half of households earn more, half less.","sources":["census-acs-2024-b19013","census-api-acs2024-b19013"],"tags":["census","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Pulled the table from the data.census.gov table API (JSON) and recomputed shares. B19013_001E = 139,801, MOE 6,180.","note":"MOE wording tightened from \"about $6,000\" to \"about $6,200\"."}],"kind":"fact","question":"What was San Francisco's median household income in 2024?","distractors":["About $85,000","About $110,000","About $200,000"],"asOf":"2024-12-31"},{"id":"triv-analysis-neighborhoods","name":"41","tier":4,"explanation":"The Department of Public Health and the Mayor's Office of Housing created 41 neighborhoods by grouping census tracts so that city data can be reported consistently. Real-estate and resident definitions produce far more.","sources":["datasf-analysis-neighborhoods","datasf-analysis-neighborhoods-meta"],"tags":["geography","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"DataSF Socrata API: dataset metadata description says DPH and MOHCD created \"these 41 neighborhoods\"; $select=count(*) on the resource returns 41."}],"kind":"fact","question":"How many 'Analysis Neighborhoods' does the city use for official statistics?","distractors":["24","36","57"],"asOf":"2026-11-01"},{"id":"triv-muni-founded","name":"1912","tier":2,"explanation":"Service began on December 28, 1912 on the A and B lines along Geary Street, making Muni the first publicly owned and operated transit agency in a major American city — the 'People's Railway'.","sources":["sfmta-history","wp-muni"],"tags":["transit","history"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"SFMTA history page: streetcar service inaugurated 28 Dec 1912 on Geary; first publicly owned and operated transit agency in a major American city; \"People's Railway\".","note":"Removed unsupported sentence about Streetcar No. 1 surviving in the historic fleet."}],"kind":"fact","question":"In what year did Muni begin running streetcars on Geary Street?","distractors":["1873","1906","1927"]},{"id":"triv-bart-opened","name":"1972","tier":2,"explanation":"BART began service on September 11, 1972, and the initial system opened in stages through 1974. The system now has 50 stations on about 131 miles of track.","sources":["wp-bart"],"tags":["transit","history"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia BART: passenger service began 11 Sep 1972; system opened in stages through 1974; 50 stations, about 131 miles."}],"kind":"fact","question":"In what year did BART carry its first passengers?","distractors":["1964","1968","1976"]},{"id":"triv-bay-to-breakers","name":"1912","tier":3,"explanation":"First held on New Year's Day 1912 as the Cross-City Race, it has been run more consecutive years over the same course and distance than any other footrace in the world.","sources":["wp-bay-to-breakers"],"tags":["events"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Bay to Breakers: began New Year's Day 1912 as the Cross-City Race (wikitext); 12 km / 7.46 mi; most consecutive years over the same course and length."}],"kind":"fact","question":"Bay to Breakers, the 12 km race from the Embarcadero to Ocean Beach, has been run every year since when?","distractors":["1906","1937","1964"]},{"id":"triv-chinatown-oldest","name":"The oldest Chinatown in North America","tier":1,"explanation":"Established in the early 1850s, it is the continent's oldest Chinatown and one of the largest Chinese enclaves outside Asia. The Dragon Gate at Grant and Bush was dedicated in 1970.","sources":["wp-chinatown"],"tags":["neighborhoods"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Chinatown, San Francisco: oldest Chinatown in North America, one of the largest Chinese enclaves outside Asia, established early 1850s; Dragon Gate dedicated 1970 (image caption)."}],"kind":"fact","question":"What distinction does San Francisco's Chinatown hold?","distractors":["The largest Chinatown in the world","The only Chinatown on the West Coast","The newest Chinatown in the United States"]},{"id":"triv-japantowns-remaining","name":"3","tier":3,"explanation":"Only San Francisco, San José and Los Angeles's Little Tokyo remain of the dozens that existed before World War II internment. San Francisco's, centered on the Japan Center and Peace Pagoda, is among the oldest ethnic enclaves in the country.","sources":["wp-japantown","wp-japantown-sf"],"tags":["neighborhoods"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Japantown (three recognized Japantowns remain: SF, San Jose, LA Little Tokyo; 43 once existed in California; WWII internment) and Japantown, San Francisco (Japan Center, Peace Pagoda, among the oldest ethnic enclaves)."}],"kind":"fact","question":"San Francisco's Japantown is one of how many recognized Japantowns left in the United States?","distractors":["1","6","12"]},{"id":"triv-city-budget","name":"About $16 billion","tier":3,"explanation":"On July 24, 2025 Mayor Lurie signed the city's two-year budget, $15.9 billion for fiscal year 2025–26, closing an $800 million deficit. Because the city is also a county, the figure covers everything from Muni and the airport to the hospital and jails.","sources":["sfgov-budget-2025"],"tags":["government","numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"sf.gov press release dated 24 July 2025: \"$15.9 billion budget for Fiscal Years 2025-2026 and 2026-2027\", closes $800 million deficit. Contemporary coverage (Axios, KTVU via web search) gives $15.9B as the FY2025-26 year and $16.3B for FY2026-27.","note":"Clarified that the figure is the first year of a two-year budget."}],"kind":"fact","question":"Roughly how large is San Francisco's annual city and county budget?","distractors":["About $4 billion","About $8 billion","About $40 billion"],"asOf":"2025-07-24"},{"id":"triv-first-sister-city","name":"Osaka","tier":4,"explanation":"The Osaka affiliation dates from October 7, 1957, and Osaka's gift of the Peace Pagoda anchors Japantown. Osaka's mayor cut formal ties in 2018 over a 'comfort women' memorial; Mayor Breed replied that one mayor could not unilaterally end a relationship between the two cities' peoples.","sources":["cbs-osaka-sister-city","wp-japantown-sf"],"tags":["international"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"CBS Bay Area (5 Oct 2018): affiliation since Oct 7, 1957; Osaka mayor cut ties; Breed quote. Wikipedia Japantown, San Francisco: 1957 sister city, Peace Pagoda gift from Osaka, oldest sister city, ties ended 2018.","note":"Replaced unsupported \"San Francisco still recognizes the relationship\" with Breed's sourced statement."}],"kind":"fact","question":"Which city became San Francisco's first sister city in 1957?","distractors":["Shanghai","Sydney","Taipei"]},{"id":"triv-area-code","name":"415","tier":1,"explanation":"415 was one of the 86 original North American area codes created in 1947. The 628 overlay was added in 2015.","sources":["wp-area-code-415"],"tags":["numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Area codes 415 and 628: one of 86 original 1947 area codes; 628 overlay assigned 2015."}],"kind":"fact","question":"What is San Francisco's original telephone area code?","distractors":["510","650","925"]},{"id":"triv-zip-prefix","name":"941","tier":2,"explanation":"City ZIP codes run from 94102 through 94188, all sharing the 941 prefix.","sources":["wp-san-francisco"],"tags":["numbers"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia San Francisco infobox postal codes list runs 94102–94105 … 94188 (wikitext)."}],"kind":"fact","question":"San Francisco ZIP codes begin with which three digits?","distractors":["940","945","900"]},{"id":"triv-the-city","name":"The City","tier":1,"explanation":"Bay Area residents say 'the City' or 'SF'. 'Frisco' and 'San Fran' divide opinion sharply — Herb Caen disparaged 'Frisco' for decades, though it has long been used in San Francisco's Black community.","sources":["wp-nicknames-sf","wp-san-francisco"],"tags":["nicknames"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Nicknames of San Francisco (Frisco \"disparaged by Herb Caen\", \"still used today particularly by San Francisco's Black community\") and San Francisco article (Frisco/San Fran divide opinion)."}],"kind":"fact","question":"What do most locals call San Francisco?","distractors":["Frisco","San Fran","SFO"]},{"id":"triv-boudin","name":"Boudin","tier":2,"explanation":"Isidore Boudin combined Gold Rush miners' sourdough with French technique; the bakery says it still uses a starter descended from that era. The tang comes partly from Fructilactobacillus sanfranciscensis, a bacterium first isolated here in 1971.","sources":["wp-boudin","wp-sourdough-bacterium"],"tags":["food"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Boudin Bakery (1849, Isidore Boudin, oldest continually operating business, Gold Rush starter) and Fructilactobacillus sanfranciscensis (first isolated 1971)."}],"kind":"fact","question":"Which bakery, founded in 1849, claims to be San Francisco's oldest continuously operating business?","distractors":["Tartine","Acme Bread","Ghirardelli"]},{"id":"triv-mission-burrito-origin","name":"El Faro","tier":3,"explanation":"El Faro says it served the first oversized, rice-filled burrito to a group of firefighters on September 26, 1961; La Cumbre's founders date their version to 1969. Either way, the foil-wrapped Mission burrito was born in the neighborhood.","sources":["wp-mission-burrito"],"tags":["food"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Mission burrito: El Faro claim of 26 Sep 1961 sale to firefighters; La Cumbre dates theirs to 29 Sep 1969; foil-wrapped, rice-filled."}],"kind":"fact","question":"Which Mission District taqueria claims to have sold the first Mission-style burrito, in 1961?","distractors":["La Cumbre","La Taqueria","Pancho Villa"]},{"id":"triv-irish-coffee","name":"Buena Vista Cafe","tier":2,"explanation":"Chronicle travel writer Stanton Delaplane worked with the Buena Vista to recreate the drink he had tasted at Shannon Airport, first serving it on November 10, 1952. Its inventor, Joe Sheridan, later came to work at the cafe.","sources":["wp-irish-coffee"],"tags":["food"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Irish coffee: Delaplane, Shannon Airport, Buena Vista first served 10 Nov 1952; Sheridan later emigrated to work there."}],"kind":"fact","question":"Which Fisherman's Wharf-area cafe introduced Irish coffee to America in 1952?","distractors":["Vesuvio Cafe","Tosca Cafe","Caffe Trieste"]},{"id":"triv-its-it","name":"Playland-at-the-Beach","tier":3,"explanation":"George Whitney created the oatmeal-cookie, vanilla ice cream and dark chocolate sandwich at Playland beside Ocean Beach. The company is now based in Burlingame.","sources":["wp-its-it"],"tags":["food"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia It's-It Ice Cream: invented 1928 by George Whitney at Playland at the Beach; oatmeal cookies, vanilla, dark chocolate; based in Burlingame."}],"kind":"fact","question":"The It's-It ice cream sandwich was invented in 1928 at which San Francisco amusement spot?","distractors":["Fisherman's Wharf","Ghirardelli Square","Sutro Baths"]},{"id":"triv-anchor-founded","name":"1896","tier":3,"explanation":"Anchor dates its steam beer, a style it trademarked, to 1896. Fritz Maytag saved it in 1965 and helped spark American craft brewing; Sapporo shut it in 2023, and Chobani founder Hamdi Ulukaya bought it in 2024 to revive it.","sources":["wp-anchor"],"tags":["food"],"verification":[{"by":"author:civics-agent","date":"2026-11-01","method":"authored; each fact checked against cited source"},{"by":"verifier:figures-trivia-check","date":"2026-11-01","method":"Wikipedia Anchor Brewing Company: founded 1896; Maytag 1965; closed July 2023 under Sapporo; Ulukaya purchase announced 31 May 2024.","note":"Replaced time-sensitive \"a planned revival is pending\" with the dated 2024 purchase."}],"kind":"fact","question":"In what year was Anchor Brewing, maker of Anchor Steam, founded?","distractors":["1849","1933","1965"]}]},{"id":"sf-watersheds","title":"Lost Creeks & Watersheds","subtitle":"Buried streams, vanished lagoons and the bay's rivers","description":"Find San Francisco's mostly buried creeks, filled coves and surviving lakes, then the rivers, straits and marshes of the wider bay. Buried creeks are placed at a documented point on their historic course, stated in each hint.","map":"sf","order":30,"accent":"bay","sources":[{"id":"wiki-islais-creek","title":"Islais Creek","url":"https://en.wikipedia.org/wiki/Islais_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-glen-canyon-park","title":"Glen Canyon Park","url":"https://en.wikipedia.org/wiki/Glen_Canyon_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-mission-creek","title":"Mission Creek (San Francisco)","url":"https://en.wikipedia.org/wiki/Mission_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-mission-bay","title":"Mission Bay, San Francisco","url":"https://en.wikipedia.org/wiki/Mission_Bay,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-mission-bay-historical","title":"Mission Bay (historical) – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/bay/1657128/mission-bay-historical/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01","note":"GNIS variant name: Ensenada de los Llorones."},{"id":"wiki-lobos-creek","title":"Lobos Creek","url":"https://en.wikipedia.org/wiki/Lobos_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-lobos-creek","title":"Lobos Creek – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/stream/227449/lobos-creek/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01","note":"GNIS variant name: Arroyo del Puerto."},{"id":"wiki-yosemite-creek","title":"Yosemite Creek (San Francisco)","url":"https://en.wikipedia.org/wiki/Yosemite_Creek_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"osm-yosemite-slough","title":"Yosemite Slough (OSM tidal channel node 8163687310)","url":"https://www.openstreetmap.org/node/8163687310","publisher":"OpenStreetMap","accessed":"2026-11-01"},{"id":"wiki-candlestick-point-sra","title":"Candlestick Point State Recreation Area","url":"https://en.wikipedia.org/wiki/Candlestick_Point_State_Recreation_Area","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-precita-creek","title":"Precita Creek","url":"https://en.wikipedia.org/wiki/Precita_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-precita-park","title":"Precita Park","url":"https://en.wikipedia.org/wiki/Precita_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-hayes-creek","title":"Hayes Creek","url":"https://en.wikipedia.org/wiki/Hayes_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-hayes-valley","title":"Hayes Valley, San Francisco","url":"https://en.wikipedia.org/wiki/Hayes_Valley,_San_Francisco","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"hiddenhydrology-lost-creeks","title":"Lost Creeks of the Bay Area, Part I","url":"https://www.hiddenhydrology.org/lost-creeks-of-the-bay-area-part-i/","publisher":"Hidden Hydrology","accessed":"2026-11-01","note":"Summarises Joel Pomerantz's Seep City research and the Ghost Arroyos project."},{"id":"seepcity-learn","title":"Seep City – Learn","url":"https://seepcity.joelpomerantz.com/learn.html","publisher":"Joel Pomerantz / Seep City","accessed":"2026-11-01","note":"Marsh extents drawn from 1852, 1859 and 1869 Coast Survey maps."},{"id":"wiki-arroyo-dolores","title":"Arroyo Dolores","url":"https://en.wikipedia.org/wiki/Arroyo_Dolores","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-mission-dolores","title":"Mission San Francisco de Asís","url":"https://en.wikipedia.org/wiki/Mission_San_Francisco_de_As%C3%ADs","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-lake-merced","title":"Lake Merced","url":"https://en.wikipedia.org/wiki/Lake_Merced","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-lake-merced","title":"Lake Merced – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/lake/228515/lake-merced/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01"},{"id":"wiki-pine-lake-park","title":"Pine Lake Park (San Francisco)","url":"https://en.wikipedia.org/wiki/Pine_Lake_Park_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-laguna-puerca","title":"Laguna Puerca (Pine Lake) – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/lake/1656831/laguna-puerca/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01"},{"id":"wiki-mountain-lake","title":"Mountain Lake (San Francisco)","url":"https://en.wikipedia.org/wiki/Mountain_Lake_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-mountain-lake-park","title":"Mountain Lake Park","url":"https://en.wikipedia.org/wiki/Mountain_Lake_Park","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-mountain-lake","title":"Mountain Lake – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/lake/229186/mountain-lake/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01"},{"id":"gnis-washerwomans-bay","title":"Washerwomans Bay (historical) – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/bay/1657165/washerwomans-bay-historical/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01","note":"GNIS places the historical feature at today's Greenwich and Octavia Streets."},{"id":"nps-now-then-presidio","title":"Now and Then: Presidio (Washerwoman's Bay)","url":"https://www.nps.gov/goga/learn/photosmultimedia/now-and-then-presidio.htm","publisher":"National Park Service","accessed":"2026-11-01"},{"id":"wiki-laguna-honda-reservoir","title":"Laguna Honda Reservoir","url":"https://en.wikipedia.org/wiki/Laguna_Honda_Reservoir","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-laguna-honda","title":"Laguna Honda – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/lake/226775/laguna-honda/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01"},{"id":"wiki-stow-lake","title":"Stow Lake","url":"https://en.wikipedia.org/wiki/Stow_Lake","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-strawberry-hill","title":"Strawberry Hill (San Francisco)","url":"https://en.wikipedia.org/wiki/Strawberry_Hill_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-stow-lake","title":"Stow Lake – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/lake/235569/stow-lake/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01"},{"id":"wiki-yerba-buena-cove","title":"Yerba Buena Cove","url":"https://en.wikipedia.org/wiki/Yerba_Buena_Cove","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"gnis-yerba-buena-cove","title":"Yerba Buena Cove (historical) – GNIS","url":"https://geo.mytopo.com/feature/california/san-francisco/bay/1655585/yerba-buena-cove-historical/","publisher":"USGS GNIS via MyTopo","accessed":"2026-11-01"},{"id":"wiki-rincon-point","title":"Rincon Point (San Francisco)","url":"https://en.wikipedia.org/wiki/Rincon_Point_(San_Francisco)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-el-polin-spring","title":"El Polín Spring","url":"https://en.wikipedia.org/wiki/El_Pol%C3%ADn_Spring","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"presidio-el-polin","title":"Presidio's El Polín Spring revitalized to highlight archaeological, natural treasures (press release, Oct 26 2011)","url":"https://presidio.gov/about/press/presidios-el-polin-spring-revitalized-to-highlight-archaeological-natural-treasures","publisher":"Presidio Trust","accessed":"2026-11-01"},{"id":"wiki-crissy-field","title":"Crissy Field","url":"https://en.wikipedia.org/wiki/Crissy_Field","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-guadalupe-river","title":"Guadalupe River (California)","url":"https://en.wikipedia.org/wiki/Guadalupe_River_(California)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-coyote-creek","title":"Coyote Creek (Santa Clara County)","url":"https://en.wikipedia.org/wiki/Coyote_Creek_(Santa_Clara_County)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-alameda-creek","title":"Alameda Creek","url":"https://en.wikipedia.org/wiki/Alameda_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-napa-river","title":"Napa River","url":"https://en.wikipedia.org/wiki/Napa_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-petaluma-river","title":"Petaluma River","url":"https://en.wikipedia.org/wiki/Petaluma_River","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-sonoma-creek","title":"Sonoma Creek","url":"https://en.wikipedia.org/wiki/Sonoma_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-walnut-creek","title":"Walnut Creek (Contra Costa County)","url":"https://en.wikipedia.org/wiki/Walnut_Creek_(Contra_Costa_County)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-san-lorenzo-creek","title":"San Lorenzo Creek","url":"https://en.wikipedia.org/wiki/San_Lorenzo_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-san-francisquito-creek","title":"San Francisquito Creek","url":"https://en.wikipedia.org/wiki/San_Francisquito_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-corte-madera-creek","title":"Corte Madera Creek (Marin County)","url":"https://en.wikipedia.org/wiki/Corte_Madera_Creek_(Marin_County)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-suisun-bay","title":"Suisun Bay","url":"https://en.wikipedia.org/wiki/Suisun_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-suisun-marsh","title":"Suisun Marsh","url":"https://en.wikipedia.org/wiki/Suisun_Marsh","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-san-pablo-bay","title":"San Pablo Bay","url":"https://en.wikipedia.org/wiki/San_Pablo_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-carquinez-strait","title":"Carquinez Strait","url":"https://en.wikipedia.org/wiki/Carquinez_Strait","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-delta","title":"Sacramento–San Joaquin River Delta","url":"https://en.wikipedia.org/wiki/Sacramento%E2%80%93San_Joaquin_River_Delta","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-richardson-bay","title":"Richardson Bay","url":"https://en.wikipedia.org/wiki/Richardson_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-tomales-bay","title":"Tomales Bay","url":"https://en.wikipedia.org/wiki/Tomales_Bay","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-half-moon-bay","title":"Half Moon Bay, California","url":"https://en.wikipedia.org/wiki/Half_Moon_Bay,_California","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-pillar-point-harbor","title":"Pillar Point Harbor","url":"https://en.wikipedia.org/wiki/Pillar_Point_Harbor","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-bolinas-lagoon","title":"Bolinas Lagoon","url":"https://en.wikipedia.org/wiki/Bolinas_Lagoon","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-russian-river","title":"Russian River (California)","url":"https://en.wikipedia.org/wiki/Russian_River_(California)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-strawberry-creek","title":"Strawberry Creek","url":"https://en.wikipedia.org/wiki/Strawberry_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-sausal-creek","title":"Sausal Creek (Alameda County)","url":"https://en.wikipedia.org/wiki/Sausal_Creek_(Alameda_County)","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-drakes-estero","title":"Drakes Estero","url":"https://en.wikipedia.org/wiki/Drakes_Estero","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-lake-merritt","title":"Lake Merritt","url":"https://en.wikipedia.org/wiki/Lake_Merritt","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"wiki-pescadero-creek","title":"Pescadero Creek","url":"https://en.wikipedia.org/wiki/Pescadero_Creek","publisher":"Wikipedia","accessed":"2026-11-01"},{"id":"nps-lobos-creek-valley","title":"Lobos Creek Valley","url":"https://home.nps.gov/prsf/planyourvisit/lobos-creek-valley.htm","publisher":"National Park Service","accessed":"2026-11-01","note":"States that Lobos Creek is the last free-flowing stream in San Francisco."},{"id":"calparks-yosemite-slough","title":"Yosemite Slough Restoration and Public Access Project","url":"https://calparks.org/what-were-doing/park-funding/yosemite-slough","publisher":"California State Parks Foundation","accessed":"2026-11-01","note":"Phase 1 (north-side wetlands, $12.2M) completed June 2012; Phase 2 adds access."},{"id":"wiki-forest-hill-station","title":"Forest Hill station (Muni Metro)","url":"https://en.wikipedia.org/wiki/Forest_Hill_station_(Muni_Metro)","publisher":"Wikipedia","accessed":"2026-11-01","note":"Station originally named Laguna Honda."}],"items":[{"id":"islais-creek","name":"Islais Creek","tier":1,"explanation":"The city's largest historic watershed, nearly 5,000 acres: one branch rose below Twin Peaks and ran through Glen Canyon, another started near Cayuga and Regent and followed Mission Street, and together they reached a tidal estuary near Industrial Street and Oakdale Avenue. The supervisors voted to fill the estuary with 1906 earthquake debris; about a mile of channel survives at Third Street, crossed by a bascule drawbridge carrying the T line. The name comes from 'islay', the hollyleaf cherry.","sources":["wiki-islais-creek"],"aliases":["Islais Creek Channel"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"hint: point is at the bay mouth, ~1 km east of the Third Street bridge (not at the bridge)"}],"kind":"place","map":"sf","lat":37.74833,"lon":-122.37556,"category":"creek","toleranceKm":0.8,"hint":"Point is the mouth of the surviving Islais Creek Channel at the bay, about 1 km east of the Third Street bascule bridge. Most of the creek is now a combined-sewer culvert."},{"id":"glen-canyon-islais","name":"Glen Canyon (Islais Creek headwaters)","tier":2,"explanation":"The one place Islais Creek still runs in the open, below red Franciscan chert cliffs in a 70-acre park; it drops into a culvert at the canyon's south end. Here the Giant Powder Company made the first commercial dynamite in the United States under licence from Alfred Nobel in March 1868, until the plant blew up in November 1869 (California Historical Landmark 1002). Adolph Sutro owned the canyon earlier as his 'Gum Tree Ranch'.","sources":["wiki-glen-canyon-park","wiki-islais-creek"],"aliases":["Glen Canyon Park"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.739,"lon":-122.442,"category":"creek","hint":"Point is the canyon floor in Glen Canyon Park, Glen Park."},{"id":"mission-creek","name":"Mission Creek","tier":1,"explanation":"Once navigable from Mission Bay inland almost to Mission Dolores, where several small creeks met in a wetland of dunes and tidal flats; the state declared it navigable in 1854 and revoked most of that status in 1874 as it was filled. Only the Mission Creek Channel at China Basin remains above ground, lined since 1960 by a houseboat community the state moved here from Islais Creek, and ending at McCovey Cove beyond Oracle Park's right-field wall.","sources":["wiki-mission-creek","seepcity-learn","wiki-mission-dolores"],"aliases":["Mission Creek Channel"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"hint reworded; Camp/Albion chapel site confirmed from Mission Dolores article (added as source)"}],"kind":"place","map":"sf","lat":37.76404,"lon":-122.4227,"category":"creek","toleranceKm":0.8,"hint":"Point is near Camp and Albion Streets, the marked site of the original Mission Dolores chapel and lagoon; Wikipedia places the creek's source near the Mission. The open channel is 3 km east at China Basin."},{"id":"mission-bay-historical","name":"Mission Bay (historic)","tier":1,"explanation":"A shallow bay and salt marsh of more than 500 acres fed by Mission Creek, which GNIS also records as 'Ensenada de los Llorones'. From the mid-1800s it became the city's dump for construction debris and then 1906 rubble; Southern Pacific's railyards, shipyards and canneries covered the fill. Redevelopment announced in 1998 brought the UCSF Mission Bay campus and its hospital (opened 2015) and Chase Center (2019) to land that was open water.","sources":["wiki-mission-bay","gnis-mission-bay-historical"],"aliases":["Ensenada de los Llorones"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"2015 is the hospital opening, not the campus; explanation corrected"}],"kind":"place","map":"sf","lat":37.77076,"lon":-122.39414,"category":"bay","toleranceKm":1,"hint":"Point is the GNIS location of the former bay, around today's Mission Creek Channel and UCSF."},{"id":"lobos-creek","name":"Lobos Creek","tier":2,"explanation":"San Francisco's last free-flowing creek, fed by Presidio runoff and by seepage from the springs that also feed Mountain Lake. It reaches the Pacific between Baker Beach and China Beach, and about a million gallons a day, roughly half its flow, is diverted to a treatment plant as the Presidio's main drinking-water supply. The name is from 'lobo marino', sea lion; GNIS also lists it as Arroyo del Puerto.","sources":["wiki-lobos-creek","gnis-lobos-creek","nps-lobos-creek-valley"],"aliases":["Arroyo del Puerto"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"'last free-flowing creek' not in Wikipedia; supported by NPS Lobos Creek Valley page (source added)"}],"kind":"place","map":"sf","lat":37.79093,"lon":-122.48534,"category":"creek","hint":"Point is the mouth at the south end of Baker Beach."},{"id":"yosemite-creek","name":"Yosemite Creek & Slough","tier":2,"explanation":"Rises at Yosemite Marsh in McLaren Park and flows mostly in culverts under Bayview to Yosemite Slough, the tidal inlet between Hunters Point and Candlestick Point. The SFPUC began studying daylighting the buried reaches in 2007, and the California State Parks Foundation's Yosemite Slough restoration finished its first phase, the north-shore wetlands, in June 2012, with later phases adding trails and access; Candlestick Point itself is 170 acres of fill meant for a wartime shipyard that became the state's first urban recreation area in 1977.","sources":["wiki-yosemite-creek","osm-yosemite-slough","wiki-candlestick-point-sra","calparks-yosemite-slough"],"aliases":["Yosemite Slough"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"'restoring since 2011' unsupported by cited articles; replaced with Phase 1 completion June 2012 per California State Parks Foundation (source added)"}],"kind":"place","map":"sf","lat":37.72319,"lon":-122.38433,"category":"creek","toleranceKm":0.8,"hint":"Point is Yosemite Slough, the creek's tidal mouth, north of Candlestick Point."},{"id":"precita-creek","name":"Precita Creek","tier":3,"explanation":"A stream rising near Market and 24th Streets that followed today's Precita Avenue and Army Street (now Cesar Chavez) east to the Islais Creek bog. A village had grown along it by the 1860s, drawing water upstream and using it as an open sewer; it was paved over between the 1880s and 1900s to create Army Street. The name is Spanish for a dam or weir.","sources":["wiki-precita-creek","wiki-precita-park"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"removed unsupported 'roughly 3-mile'; hint reworded per Precita Creek/Park articles"}],"kind":"place","map":"sf","lat":37.74706,"lon":-122.41203,"category":"creek","hint":"Point is Precita Park, bounded north and south by Precita Avenue, which was laid out along the creek in the early 1850s."},{"id":"hayes-creek","name":"Hayes Creek","tier":3,"explanation":"A seasonal stream that cut diagonally across what is now Hayes Valley each winter on its way to the Mission Creek marsh, where Ohlone people gathered food; it is now underground year-round. BART still runs dewatering pumps against the groundwater, and the Ghost Arroyos art project chalked its route down 7th Street. The valley is named for Thomas Hayes, county clerk 1853–56 and holder of the first Market Street railway franchise.","sources":["wiki-hayes-creek","wiki-hayes-valley","hiddenhydrology-lost-creeks"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.7764,"lon":-122.4262,"category":"creek","hint":"Point is the center of Hayes Valley near Patricia's Green; the creek ran diagonally through the neighborhood toward Market Street and City Hall."},{"id":"arroyo-dolores","name":"Arroyo de los Dolores (Dolores Creek)","tier":3,"explanation":"'Our Lady of Sorrows Creek', the stream scouted by Pedro Font on the Anza expedition in March 1776 that gave Mission Dolores its everyday name. It fed Lake Dolores, a shallow seasonal lagoon beside which the first chapel was built, and drained to Mission Creek. Historian Joel Pomerantz later corrected his own earlier account: the Mission probably never had an enduring lake, only stream-fed wetland.","sources":["wiki-arroyo-dolores","wiki-mission-creek","wiki-mission-dolores","hiddenhydrology-lost-creeks"],"aliases":["Dolores Creek","Laguna de los Dolores"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"hint made precise"}],"kind":"place","map":"sf","lat":37.76264,"lon":-122.41671,"category":"creek","hint":"Point is Wikipedia's coordinate for the buried creek, near 18th Street and South Van Ness Avenue, about 1 km east of Dolores Park."},{"id":"lake-merced","name":"Lake Merced","tier":1,"explanation":"Named 'Laguna de Nuestra Señora de la Merced' by Bruno de Heceta in 1775, a freshwater lake that once drained to the ocean; in 1852 a fissure opened and it dropped about 30 feet. The Spring Valley Water Company bought its water rights in 1868 as part of its city-wide monopoly, broken only when Hetch Hetchy was approved in 1908. Senator David Broderick was shot dead by David Terry in a duel on its shore on September 13, 1859.","sources":["wiki-lake-merced","gnis-lake-merced"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.72093,"lon":-122.4936,"category":"lake","toleranceKm":1,"hint":"Bordered by Harding Park, the Olympic Club and SF State."},{"id":"pine-lake","name":"Pine Lake (Laguna Puerca)","tier":3,"explanation":"One of the few natural lakes left in San Francisco, tucked in Pine Lake Park west of Stern Grove, and still recorded by USGS under its Spanish name Laguna Puerca (roughly 'pig lagoon'). Both the lake and Stern Grove were part of the Greene family's land until an 1887 lawsuit stripped most of it away; a trail around the lake links to the grove.","sources":["wiki-pine-lake-park","gnis-laguna-puerca"],"aliases":["Laguna Puerca"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.73619,"lon":-122.48883,"category":"lake"},{"id":"mountain-lake","name":"Mountain Lake","tier":2,"explanation":"One of the last natural lakes in the city and the only one in the GGNRA, where Juan Bautista de Anza camped for two days in 1776 and picked the site for the Presidio. Once about 30 ft deep, it was drawn down for golf-course irrigation in 1897, shrunk by MacArthur Tunnel fill in 1939 and by Park Presidio Boulevard, and poisoned by lead from car exhaust; the sediment was treated for lead in 1997 and non-native fish were poisoned off in 2014 as part of a wider restoration.","sources":["wiki-mountain-lake","wiki-mountain-lake-park","gnis-mountain-lake"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.78803,"lon":-122.47094,"category":"lake","hint":"About 4 acres, just east of Park Presidio Boulevard at the Presidio's south edge."},{"id":"washerwomans-lagoon","name":"Washerwoman's Lagoon","tier":3,"explanation":"A spring-fed lake in Cow Hollow, Laguna Pequeña to the Mexicans, bounded by today's Lombard, Filbert, Gough and Laguna Streets, named for the indigenous women who washed clothes there. Gold Rush crowds did their laundry in it, slaughterhouses and sewage from Russian and Nob hills fouled it, and it was mostly filled in 1877; the last of the bay beyond was filled for the 1915 Panama-Pacific Exposition.","sources":["gnis-washerwomans-bay","nps-now-then-presidio","hiddenhydrology-lost-creeks"],"aliases":["Washerwoman's Bay","Laguna Pequeña"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.79993,"lon":-122.42942,"category":"lagoon","hint":"Point is GNIS's location for the vanished lagoon at Greenwich and Octavia."},{"id":"laguna-honda","name":"Laguna Honda","tier":3,"explanation":"A reservoir on the southwest shoulder of Mount Sutro, into which the Spring Valley Water Works ran a 13-mile redwood pipeline from Pilarcitos Lake in 1865 to supply the city; the 1906 earthquake destroyed the pipeline. The lake and its slopes are managed by the SFPUC, and the neighborhood, hospital and the old name of Forest Hill station all borrow its name.","sources":["wiki-laguna-honda-reservoir","gnis-laguna-honda","wiki-forest-hill-station"],"aliases":["Laguna Honda Reservoir"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"'old name of Forest Hill station' confirmed via Forest Hill station article (source added)"}],"kind":"place","map":"sf","lat":37.75266,"lon":-122.46198,"category":"lake","hint":"Between Laguna Honda Boulevard and the Mount Sutro forest."},{"id":"stow-lake","name":"Stow Lake","tier":2,"explanation":"The largest of Golden Gate Park's man-made lakes, a ring of water around Strawberry Hill, named for William W. Stow who gave $60,000 toward building it. Rowboats and pedal boats rent at the boathouse, and the electrically pumped Huntington Falls tumbles off the island. It has since been officially renamed Blue Heron Lake, the name Wikipedia's Strawberry Hill article now uses.","sources":["wiki-stow-lake","wiki-strawberry-hill","gnis-stow-lake"],"aliases":["Blue Heron Lake"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.76833,"lon":-122.47319,"category":"lake","hint":"Artificial. The Chinese pavilion on its shore was a 1976 gift from Taipei."},{"id":"yerba-buena-cove","name":"Yerba Buena Cove","tier":2,"explanation":"The crescent cove where the village of Yerba Buena stood, with its beach at today's Montgomery Street between Clay and Washington and its horns at Clark's Point (Broadway and Battery) and Rincon Point (Harrison and Spear). Between the Gold Rush and 1860 it was filled, partly by scuttling ships so owners could claim the land; the Niantic, Apollo and Rome still lie under downtown, the Rome found in 1994 while digging the Muni turnback tunnel.","sources":["wiki-yerba-buena-cove","gnis-yerba-buena-cove"],"aliases":["Yerba Buena shoreline","Montgomery Street shoreline"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.79298,"lon":-122.39636,"category":"bay","toleranceKm":0.8,"hint":"Point is GNIS's location for the historical cove, in today's Financial District near the Embarcadero."},{"id":"rincon-point","name":"Rincon Point","tier":4,"explanation":"The rocky cape that closed the south end of Yerba Buena Cove, below Rincon Hill. It survives only as a name: the former shoreline now runs along Spear Street between Harrison and Folsom, and USGS places the point itself at the foot of Pier 26, under the Bay Bridge, on land that did not exist in 1849.","sources":["wiki-rincon-point","wiki-yerba-buena-cove"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City"}],"kind":"place","map":"sf","lat":37.78889,"lon":-122.38694,"category":"bay","hint":"Under the Bay Bridge anchorage on the Embarcadero."},{"id":"el-polin-spring","name":"El Polín Spring (Tennessee Hollow)","tier":3,"explanation":"The Presidio's only named spring and the source of the central branch of Tennessee Hollow Creek, used by the Ohlone, the Spanish garrison and the U.S. Army, and said to grant many children (and a notable number of twins) to a woman who drank from it under a full moon. The foundation of an adobe believed to have housed the Briones and Miramontes families, including a young Juana Briones, has been excavated here. The Army buried the creek after 1906; the Presidio Trust removed 77,000 tons of fill downstream in 2005 and restored the spring and its 1940 WPA cobblestone channel in 2011.","sources":["wiki-el-polin-spring","presidio-el-polin"],"aliases":["Tennessee Hollow Creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"removed unsupported '2003' date for the adobe find and unverified 'below Inspiration Point'; Army burial after 1906 confirmed by Presidio Trust release"}],"kind":"place","map":"sf","lat":37.7929,"lon":-122.45534,"category":"creek","hint":"Point is the spring at the head of Tennessee Hollow, on El Polín Loop in the Presidio."},{"id":"crissy-field-marsh","name":"Crissy Field marsh","tier":2,"explanation":"Originally a 130-acre salt marsh and estuary on the Presidio bayfront, filled in from the 1870s, the job finished in time for the 1915 Panama-Pacific Exposition, and then turned into an Army airfield, accepted in 1921 and named for Major Dana Crissy, killed in a 1919 transcontinental endurance flight. The 1990s restoration hauled out 87,000 tons of hazardous material and re-dug a tidal marsh approximating the pre-military shoreline.","sources":["wiki-crissy-field"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point reverse-geocoded with Nominatim and compared with GNIS/Wikipedia coordinates; course/history claims checked sentence-by-sentence against the cited Wikipedia articles, GNIS (DomesticNames_CA), NPS/Presidio Trust pages, Hidden Hydrology/Seep City","note":"fill dates corrected to article (1870s, finished for 1915 PPIE)"}],"kind":"place","map":"sf","lat":37.8042,"lon":-122.4597,"category":"marsh","toleranceKm":0.8,"hint":"The restored tidal marsh beside the Crissy Field promenade."},{"id":"guadalupe-river","name":"Guadalupe River","tier":2,"explanation":"A 14-mile river that begins below Lake Almaden, where Los Alamitos Creek joins Guadalupe Creek and runs north through downtown San Jose to Alviso on the south bay. It flooded the San Jose Arena area in 1995, cancelling a Sharks game and earning a federal disaster declaration, and it still carries mercury washed from the former quicksilver mines in today's Almaden Quicksilver County Park.","sources":["wiki-guadalupe-river"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"removed unsupported 'Mexican-era'; confluence wording aligned with article"}],"kind":"place","map":"bay","lat":37.42569,"lon":-121.97917,"category":"river","toleranceKm":8,"hint":"Point is the mouth at Alviso, south San Francisco Bay."},{"id":"coyote-creek","name":"Coyote Creek (Santa Clara County)","tier":2,"explanation":"Rising on Mount Sizer near Henry W. Coe State Park in the Diablo Range, it runs 63.6 miles through Coyote and Anderson reservoirs and the east side of San Jose to the bay near Calaveras Point. In February 2017 Anderson Reservoir hit 104% of capacity and spilled, the creek set a record 14.4-ft crest and about 14,000 San Jose residents were forced from their homes.","sources":["wiki-coyote-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"hint aligned with article infobox"}],"kind":"place","map":"bay","lat":37.45722,"lon":-122.04889,"category":"creek","toleranceKm":8,"hint":"Point is the mouth on the south bay near Calaveras Point, about 8 miles west of Milpitas."},{"id":"alameda-creek","name":"Alameda Creek","tier":2,"explanation":"A 45-mile stream draining about 700 square miles of the Diablo Range, the largest watershed entering the bay after the Sacramento and San Joaquin. It cuts through the East Bay hills in Niles Canyon, evidence that the creek is older than the hills. A fish ladder at the BART weir finished in April 2022 removed the last barrier, and by November 2025 Chinook salmon were reported 20 miles upstream.","sources":["wiki-alameda-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.56333,"lon":-122.13083,"category":"creek","toleranceKm":8,"hint":"Point is the southern (main) mouth near Fremont and Union City."},{"id":"napa-river","name":"Napa River","tier":2,"explanation":"Flows 55 miles from Mount Saint Helena through Calistoga, St. Helena, Oakville and the city of Napa to Mare Island Strait at Vallejo, draining the Napa Valley wine region. A 1986 flood drove 5,000 people out and killed three; voters approved the Napa River Flood Project in 1998 and the project was completed by 2015.","sources":["wiki-napa-river"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.07,"lon":-122.24389,"category":"river","toleranceKm":9,"hint":"Point is the mouth at Mare Island Strait, north end of San Pablo Bay."},{"id":"petaluma-river","name":"Petaluma River","tier":3,"explanation":"Only 18 miles long and a tidal slough for most of its length, it was 'Petaluma Creek' until the early 1960s and becomes navigable in Petaluma's old town, where the Army Corps still dredges for gravel barges. Its lower reach winds through the 5,000-acre Petaluma Marsh, the largest remaining salt marsh on San Pablo Bay.","sources":["wiki-petaluma-river"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.11056,"lon":-122.4875,"category":"river","toleranceKm":8,"hint":"Point is the mouth on San Pablo Bay, about 5 miles east of Novato."},{"id":"sonoma-creek","name":"Sonoma Creek","tier":3,"explanation":"A 33-mile creek from the Sugarloaf Ridge hills past Kenwood, Glen Ellen (within a mile of Jack London's Wolf House) and the town of Sonoma to San Pablo Bay through the Napa Sonoma Marsh. Its watershed is essentially the Sonoma Valley wine region, and its federally threatened steelhead have lost spawning habitat mainly to sedimentation.","sources":["wiki-sonoma-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.15056,"lon":-122.40361,"category":"creek","toleranceKm":8,"hint":"Point is the mouth on San Pablo Bay."},{"id":"walnut-creek","name":"Walnut Creek (Contra Costa)","tier":3,"explanation":"Arroyo de las Nueces to the Spanish, for the walnuts on its banks, and the namesake of the city whose post office opened in the 1860s. It forms where Las Trampas and Tice creeks meet, runs 12.3 miles mostly in a concrete or earthen flood-control channel, and joins Pacheco Creek on its way to Suisun Bay.","sources":["wiki-walnut-creek"],"aliases":["Arroyo de las Nueces"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"removed unsupported 'last four miles through Concord Marsh'; point matches article mouth coordinate"}],"kind":"place","map":"bay","lat":38.02417,"lon":-122.07028,"category":"creek","toleranceKm":8,"hint":"Point is the mouth near Martinez, where Walnut Creek meets Pacheco Creek at the edge of Suisun Bay."},{"id":"san-lorenzo-creek","name":"San Lorenzo Creek","tier":4,"explanation":"A 10.7-mile creek that begins in Castro Valley, gathers Cull Canyon Reservoir's outflow, and reaches the bay at the Hayward Regional Shoreline. In the 1960s Sulphur Creek was diverted into it to reduce flooding in downtown Hayward.","sources":["wiki-san-lorenzo-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.67028,"lon":-122.16278,"category":"creek","toleranceKm":8,"hint":"Point is the mouth at the Hayward shoreline."},{"id":"san-francisquito-creek","name":"San Francisquito Creek","tier":3,"explanation":"The 12.9-mile creek that, with its tributary Los Trancos Creek, forms the San Mateo–Santa Clara county line. The Portolá expedition camped beside it for five nights in November 1769 after sighting the bay, and the redwood El Palo Alto on its bank gave Palo Alto its name. Searsville Dam (1892) upstream is more than 90% silted in; El Niño storms in 1998 overtopped the levees.","sources":["wiki-san-francisquito-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.46611,"lon":-122.11528,"category":"creek","toleranceKm":8,"hint":"Point is the mouth at the southwest edge of the bay near East Palo Alto."},{"id":"corte-madera-creek","name":"Corte Madera Creek","tier":4,"explanation":"Formed in Ross where San Anselmo and Ross creeks join, it flows just 4.5 miles southeast to the bay near Corte Madera. Ross Creek drains the north face of Mount Tamalpais, whose 2,571-ft East Peak is the watershed's high point; the name is Spanish for 'a place where wood is cut'.","sources":["wiki-corte-madera-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.94167,"lon":-122.50222,"category":"creek","toleranceKm":8,"hint":"Point is the mouth near Larkspur Landing / Corte Madera."},{"id":"suisun-bay","name":"Suisun Bay","tier":2,"explanation":"The brackish bay where the Sacramento and San Joaquin rivers meet, the gateway to the Delta, draining west through Carquinez Strait. It was named in 1811 for the Suisunes, a Patwin people whose name roughly means 'where the west wind blows', and for decades held the Navy's mothballed 'Ghost Fleet'; the last of 57 reserve ships left in August 2017.","sources":["wiki-suisun-bay"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.07,"lon":-122.07,"category":"bay","toleranceKm":10,"hint":"Between the Benicia–Martinez bridges and the Delta."},{"id":"suisun-marsh","name":"Suisun Marsh","tier":3,"explanation":"About 116,000 acres of land, bays and sloughs north of Suisun Bay, the largest brackish marsh on the U.S. West Coast (a claim Wikipedia flags as debatable, though it is certainly California's largest). Waterfowl hunting dominates, with 158 private duck clubs, and the Grizzly Island Wildlife Area hosts 230 bird species, river otters and a tule elk herd.","sources":["wiki-suisun-marsh"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.18774,"lon":-122.06463,"category":"marsh","toleranceKm":10,"hint":"North shore of Suisun Bay, around Grizzly Island and Montezuma Slough."},{"id":"san-pablo-bay","name":"San Pablo Bay","tier":1,"explanation":"The northern lobe of San Francisco Bay, about 10 miles across and 90 square miles, named for Rancho San Pablo, an 1815 Spanish land grant on its east shore. The Sacramento–San Joaquin flow enters from Carquinez Strait, the Petaluma River and Sonoma Creek empty into it from the north, and the Napa River arrives through Mare Island Strait at its north-east corner.","sources":["wiki-san-pablo-bay"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"Napa River enters via Mare Island Strait/Carquinez per article; wording corrected"}],"kind":"place","map":"bay","lat":38.067,"lon":-122.383,"category":"bay","toleranceKm":12,"hint":"Crossed by the Richmond–San Rafael Bridge at its south end."},{"id":"carquinez-strait","name":"Carquinez Strait","tier":2,"explanation":"The 8-mile tidal strait through which the entire Sacramento and San Joaquin river system drains from Suisun Bay into San Pablo Bay. It is named for the Karkin, an Ohlone people who lived on both shores, and is spanned by the Carquinez Bridge (I-80) and the Benicia–Martinez Bridge (I-680).","sources":["wiki-carquinez-strait"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.05918,"lon":-122.2126,"category":"bay","toleranceKm":8,"hint":"Between Vallejo/Crockett and Benicia/Martinez."},{"id":"sac-sj-delta","name":"Sacramento–San Joaquin Delta","tier":1,"explanation":"An inverted delta of 1,153 square miles where the two great Central Valley rivers meet near Pittsburg at the head of Suisun Bay: about 57 reclaimed islands and tracts behind 1,100 miles of levees along 700 miles of waterways. Pumps at Clifton Court Forebay send water south through the State Water Project and Central Valley Project, and the threatened delta smelt is the estuary's indicator species.","sources":["wiki-delta"],"aliases":["The Delta","Sacramento-San Joaquin River Delta"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"removed unsupported '5 million acre-feet a year'"}],"kind":"place","map":"bay","lat":38.067975,"lon":-121.8427354,"category":"watershed","toleranceKm":12,"hint":"Point is the Wikipedia center of the Delta, between Antioch, Rio Vista and Stockton."},{"id":"richardson-bay","name":"Richardson Bay","tier":2,"explanation":"The arm of the bay between Sausalito, Tiburon and Belvedere, named for sea captain William A. Richardson (the apostrophe in 'Richardson's Bay' was later dropped). About 100 people lived aboard anchored-out boats a quarter mile offshore as of 2019, Sausalito's herring fleet works it in winter, and Audubon has run a 911-acre sanctuary on its Tiburon shore since the early 1960s.","sources":["wiki-richardson-bay"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.875,"lon":-122.48333,"category":"bay","toleranceKm":8,"hint":"Off Sausalito and Mill Valley, just north of the Golden Gate."},{"id":"tomales-bay","name":"Tomales Bay","tier":2,"explanation":"A narrow 15-mile inlet, barely a mile wide, lying directly on a drowned stretch of the San Andreas Fault, so the Point Reyes peninsula on its west shore sits across the fault from mainland Marin. Vizcaíno's men took it for a river in 1603 and called it Rio Grande de San Sebastián; today Hog Island and Tomales Bay oyster companies make it the region's oyster capital.","sources":["wiki-tomales-bay"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.1486,"lon":-122.89787,"category":"bay","toleranceKm":10,"hint":"Separates Point Reyes from mainland Marin."},{"id":"half-moon-bay","name":"Half Moon Bay","tier":3,"explanation":"The crescent-shaped bay south of Pillar Point that gave the coastside town its name. Pillar Point Harbor at its north end is sheltered by Army Corps breakwaters built 1959–61 (extended 1967, inner breakwater 1982), and the Mavericks big-wave break, ridden at over 50 ft, lies about half a mile off the point.","sources":["wiki-half-moon-bay","wiki-pillar-point-harbor"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.49938,"lon":-122.48803,"category":"bay","toleranceKm":8,"hint":"Point is Pillar Point Harbor at the bay's north end."},{"id":"bolinas-lagoon","name":"Bolinas Lagoon","tier":3,"explanation":"An 1,100-acre tidal estuary in West Marin occupying a trough carved by the San Andreas Fault, which runs straight through it. Stinson Beach sits on the sandbar that closes it off from the ocean, Bolinas lies across the mouth, and Kent Island rises in the middle.","sources":["wiki-bolinas-lagoon"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.918,"lon":-122.681,"category":"lagoon","toleranceKm":8,"hint":"Between Stinson Beach and Bolinas, about 15 miles northwest of the city."},{"id":"russian-river","name":"Russian River","tier":2,"explanation":"The Bay Area's second-largest river after the Sacramento: 115 miles and a 1,485-square-mile watershed, reaching the Pacific at Jenner. Russian-American Company explorer Ivan Kuskov named it the Slavyanka and founded Fort Ross 10 miles up the coast. Guerneville's record flood crest of 49.5 ft came in February 1986; Lake Mendocino and Lake Sonoma (via Dry Creek) regulate its flow.","sources":["wiki-russian-river"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":38.45056,"lon":-123.12944,"category":"river","toleranceKm":10,"hint":"Point is the mouth at Jenner on the Sonoma coast."},{"id":"strawberry-creek","name":"Strawberry Creek (Berkeley)","tier":4,"explanation":"The Berkeley Hills creek whose two forks meet on the UC Berkeley campus among coast redwoods; building Memorial Stadium buried a waterfall and culverted it there, and Depression-era projects buried more downstream. It reaches the bay through a concrete culvert south of University Avenue, and Strawberry Creek Park is an early example of daylighting a buried urban stream.","sources":["wiki-strawberry-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"hint corrected: Wikipedia coordinate is the source in Strawberry Canyon, not on campus"}],"kind":"place","map":"bay","lat":37.88083,"lon":-122.23167,"category":"creek","toleranceKm":8,"hint":"Point is the creek's GNIS source in Strawberry Canyon, in the hills above the UC Berkeley campus."},{"id":"sausal-creek","name":"Sausal Creek (Oakland)","tier":4,"explanation":"A 3.1-mile Oakland creek named for the arroyo willows ('sausal', willow grove) that lined it, flowing from Shepherd Canyon through Dimond Canyon under the historic Leimert Bridge to a culvert at the bay near Derby Avenue. In 1856 nurseryman Henderson Luelling planted hundreds of cherry trees along it and called the area Fruit Vale; Friends of Sausal Creek have tended it since 1996.","sources":["wiki-sausal-creek"],"aliases":["Fruitvale Creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text"}],"kind":"place","map":"bay","lat":37.77917,"lon":-122.22722,"category":"creek","toleranceKm":8,"hint":"Point is the mouth near Derby Avenue, Oakland."},{"id":"drakes-estero","name":"Drakes Estero","tier":3,"explanation":"A branching estuary in Point Reyes National Seashore, about 25 miles northwest of the city, recognized as the landing place of Francis Drake in 1579 and a National Historic Landmark. Interior Secretary Salazar let the oyster farm's permit expire in 2012, the last legal challenge ended in December 2014 and the farm was removed by May 2017, completing its status as part of the Phillip Burton Wilderness.","sources":["wiki-drakes-estero"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"'Park Service judges most probably' not in article; reworded to article's statement"}],"kind":"place","map":"bay","lat":38.0475,"lon":-122.94222,"category":"lagoon","toleranceKm":8,"hint":"Opens onto Drakes Bay, west of Inverness."},{"id":"lake-merritt","name":"Lake Merritt","tier":2,"explanation":"A tidal lagoon in central Oakland, originally an arm of the bay fed by several creeks, dammed around 1868 by Mayor Samuel Merritt. In 1870 the state made it the first official wildlife refuge in the United States. The 'Necklace of Lights', about 126 lampposts and 3,400 bulbs, was first lit in 1925, and Children's Fairyland sits in Lakeside Park on its shore.","sources":["wiki-lake-merritt"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"'North America' -> 'United States' per article"}],"kind":"place","map":"bay","lat":37.8039,"lon":-122.2591,"category":"lagoon","toleranceKm":8,"hint":"Downtown Oakland."},{"id":"pescadero-creek","name":"Pescadero Creek","tier":4,"explanation":"The longest stream in San Mateo County at 26.6 miles, from the edge of Castle Rock State Park through Portola Redwoods to the Pescadero Marsh Natural Preserve and the ocean 14 miles south of Half Moon Bay. The Pescadero–Butano watershed is the largest coastal basin between the Golden Gate and the San Lorenzo River; its lagoon held about 10,000 rearing steelhead in 1985 and in 2015 biologists found three hatchery-tagged coho spawning in the creek.","sources":["wiki-pescadero-creek"],"verification":[{"by":"author:hills-agent","date":"2026-11-01","method":"authored; each figure checked against cited source"},{"by":"verifier:hills-water-check","date":"2026-11-01","method":"point compared with the Wikipedia article/infobox coordinate and reverse-geocoded with Nominatim; every figure and date in explanation/hint checked against the cited Wikipedia article text","note":"coho claim aligned with article (three tagged coho in spring 2015)"}],"kind":"place","map":"bay","lat":37.26389,"lon":-122.40722,"category":"creek","toleranceKm":8,"hint":"Point is the mouth at Pescadero State Beach."}]}]