{"nrhp_refnum":"10001221","name":"Park Road 4 Historic District","other_names":["Park Road 4","Longhorn Cavern State Park Parkway","Inks Lake State Park Parkway","Hoover's Valley Road et al."],"category":"district","location":{"address":"Park Rd. 4 from US 281 to TX 29 & Longhorn Cavern State Park","address_restricted":false,"city":"Burnet","county":"Burnet County","state":"TX","lat":30.716648352500044,"lon":-98.33081247406386,"geom_source":"nps_gis"},"listed_date":"2011-02-07","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Landscape Architecture","Education","Entertainment/Recreation"],"significance_levels":["state"],"summary":{"what_it_is":"A 15.5-mile scenic parkway in Burnet County, Texas, running from US 281 south of Burnet to SH 29, together with all of Longhorn Cavern State Park. Built mainly between 1934 and 1942.","why_significant":"The nomination argues the parkway is a designed landscape that has changed little since its 1934-1942 construction and keeps outstanding design and architectural integrity. It was built by the Civilian Conservation Corps, WPA workers and the State Highway Department to give the public access to scenic Hill Country landscapes and Longhorn Cavern. Its masonry bridges, culverts, guardwalls, overlooks and park buildings are tied to the New Deal state parks program.","narrative":"Park Road 4 is a 15.5-mile, two-lane scenic parkway in Burnet County, Texas. It begins at US 281 south of Burnet, passes through Longhorn Cavern State Park and skirts the eastern edge of Inks Lake State Park before reaching SH 29. The historic district covers the road right-of-way and all of Longhorn Cavern State Park. Civilian Conservation Corps crews began the road in the mid-1930s to give visitors access to the renovated cavern, and WPA workers and the State Highway Department extended and finished it in the early 1940s. Its features include sandstone entrance portals, masonry bridges, retaining walls and guardwalls, 62 stone and concrete culverts, designed vistas and overlooks. Within the park are CCC-era buildings such as the museum, caretaker's residence, observation tower and cabin. The district was listed because it has seen little alteration since its 1934-1942 construction and shows strong design integrity as a New Deal parkway landscape.","period_of_significance":null,"architect_builder":"Civilian Conservation Corps (CCC); Works Progress Administration (WPA) workers; Texas State Highway Department","architectural_style":"OTHER: NPS Rustic; no style","criteria":[],"status_note":"Park Road 4 and Longhorn Cavern State Park remain in use as a road and park, owned by the Texas Parks and Wildlife Department; the dominant historic features remain intact with few exceptions.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:24.093504-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/25/9714/40971425/content/electronic-records/rg-079/NPS_TX/10001221.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/10001221/b0bb3d5a55-800.webp","url_1600":"https://nationalhistoricalregister.com/media/10001221/b0bb3d5a55-1600.webp","licence":"CC BY 4.0","author":"Larry D. Moore","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:Park_road_4_retaining_wall.jpg\" rel=\"noopener\">Larry D. Moore</a>, <a href=\"https://creativecommons.org/licenses/by/4.0\" rel=\"license noopener\">CC BY 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:Park_road_4_retaining_wall.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/40971425","wikipedia":null,"wikidata":"https://www.wikidata.org/wiki/Q18388806"},"indexable":true,"url":"https://nationalhistoricalregister.com/texas/burnet-county/park-road-4-historic-district-10001221/"}