{"nrhp_refnum":"71000164","name":"Angel Island, U.S. Immigration Station","other_names":[],"category":"district","location":{"address":"SE of Tiburon in San Francisco Bay","address_restricted":false,"city":"Tiburon","county":"Marin County","state":"CA","lat":37.86933744800007,"lon":-122.42637018799996,"geom_source":"nps_gis"},"listed_date":"1971-10-14","is_nhl":true,"nhl_designated_date":"1997-12-09","areas_of_significance":["Military","Prehistoric","Social History","Architecture"],"significance_levels":["state"],"summary":{"what_it_is":"Angel Island is an island of about one square mile in northern San Francisco Bay, southeast of Tiburon in Marin County, California. The nomination covers the entire island, now a state park, including its military, quarantine and immigration sites.","why_significant":"The island is tied to Spanish exploration of San Francisco Bay in 1775, Mexican ranching, and about a century of U.S. military use beginning in the 1860s. It also hosted quarantine and immigration facilities. Surviving buildings show changing architectural styles from the Civil War era to the present, and archeological sites record earlier native occupation.","narrative":"Angel Island, about one square mile in San Francisco Bay southeast of Tiburon, is a hilly island rising roughly 800 feet, with about five miles of shoreline. Juan Manuel de Ayala anchored there in 1775 while charting the bay and gave it its Spanish name. It later became a Mexican cattle ranch, was designated a military reserve in 1850, and was developed from the early 1860s as Camp Reynolds and other garrisons. The military presence lasted about a century and included coastal batteries, a World War II prisoner of war camp and missile sites. Quarantine and immigration stations also operated there. Surviving structures include officers' quarters, a hospital, residences at the quarantine station and a brick Quartermaster's Storehouse of about 1908, described as probably the finest building on the island. At least six sites are associated with Native American cultures. The federal government returned the island to California in 1954 for use as a park.","period_of_significance":null,"architect_builder":null,"architectural_style":"Varied military, quarantine and residential buildings, including balloon-frame structures, concrete masonry buildings with Mission tile roofs, and a 19th Century commercial style Quartermaster's Storehouse","criteria":[],"status_note":"The island is a California state park, returned to the state in 1954 and opened as a park in 1955. Buildings listed range from good to poor condition, and the form checks the overall condition as deteriorated and altered.","vacant_flag":null,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:55:31.133635-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/71000164.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/71000164/00387a88db-800.webp","url_1600":"https://nationalhistoricalregister.com/media/71000164/00387a88db-1600.webp","licence":"Public domain","author":"North, Hart Hyatt, 1871-","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Angel_Island_Immigration_Station_Dormitory_b.jpg\" rel=\"noopener\">North, Hart Hyatt, 1871-</a>, Public domain, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Angel_Island_Immigration_Station_Dormitory_b.jpg"},"district":{"nrhp_refnum":"07001350","name":"Berkeley High School Campus Historic District","url":"https://nationalhistoricalregister.com/districts/california/berkeley-high-school-campus-historic-district-07001350/"},"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123859654","wikipedia":"https://en.wikipedia.org/wiki/Angel_Island_Immigration_Station","wikidata":"https://www.wikidata.org/wiki/Q7890688"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/marin-county/angel-island-u-s-immigration-station-71000164/"}