{"nrhp_refnum":"07001396","name":"Muir Woods National Monument","other_names":["Muir Woods National Monument Historic District"],"category":"district","location":{"address":"Muir Woods Rd.","address_restricted":false,"city":"Mill Valley","county":"Marin County","state":"CA","lat":37.90002759150005,"lon":-122.58491100083816,"geom_source":"nps_gis"},"listed_date":"2008-01-09","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Conservation","Architecture"],"significance_levels":["national"],"summary":{"what_it_is":"Muir Woods National Monument is a 428-acre historic district in Redwood Canyon on the slopes of Mount Tamalpais near Mill Valley, Marin County, California. It preserves old-growth redwood forest and pre-1947 rustic visitor facilities, trails and memorials.","why_significant":"The monument was created in 1908 from land donated by William and Elizabeth Thacher Kent and was among the early national monuments under the Antiquities Act. The nomination argues it embodies early American conservation ideals and the National Park Service's rustic design approach in its first four decades of federal management. It also has memorials tied to key figures in the conservation movement.","narrative":"Muir Woods National Monument occupies Redwood Canyon at the foot of Mount Tamalpais in Marin County, California. The nominated area covers 428 acres and includes the old-growth redwood forest, Bohemian and Cathedral Groves, a historic trail system along Redwood Creek, memorials, and buildings, structures and objects built before World War II in a rustic style. William Kent and Elizabeth Thacher Kent gave the land to the United States in 1907, and President Theodore Roosevelt proclaimed the monument on January 8, 1908. Additional Kent gifts expanded it in 1921 and 1935. The period of significance runs from 1907 to 1947, covering the first decades of federal ownership, when the site was adapted to rising visitation under a consistent rustic design approach and became known as a symbol of American conservation. It ends with the 1947 installation of a memorial to President Franklin D. Roosevelt. Later additions and some alterations are outside the nominated area or have affected details but not overall character.","period_of_significance":"1907-1947","architect_builder":null,"architectural_style":"Other: rustic; Moderne","criteria":[],"status_note":"Administered as part of Golden Gate National Recreation Area and a popular tourist attraction with over 750,000 annual visitors; some historic features such as comfort stations, CCC footbridges and benches have been removed.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:29.71211-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/07001396.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/07001396/82fb684ac5-800.webp","url_1600":"https://nationalhistoricalregister.com/media/07001396/82fb684ac5-1600.webp","licence":"CC BY-SA 4.0","author":"Sarbjit Bahga","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Muir_Woods_National_Monument_13.jpg\" rel=\"noopener\">Sarbjit Bahga</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Muir_Woods_National_Monument_13.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123859694","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q99522841"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/marin-county/muir-woods-national-monument-07001396/"}