{"nrhp_refnum":"91000530","name":"Rancho San Lucas","other_names":["Trescony Ranch"],"category":"district","location":{"address":"1 3/4 mi. SW of jct. of Paris Valley Rd. and Rancho San Lucas entry rd.","address_restricted":false,"city":"San Lucas","county":"Monterey County","state":"CA","lat":36.04274689550007,"lon":-121.0083960775241,"geom_source":"nps_gis"},"listed_date":"1991-05-06","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture"],"significance_levels":["local"],"summary":{"what_it_is":"A historic ranch headquarters district on the 3,400-acre Rancho San Lucas (also called Trescony Ranch) in the Salinas Valley near San Lucas, Monterey County, California. It has eight buildings and one structure built between 1865 and 1888 for Alberto Trescony.","why_significant":"The nomination argues the complex is a cohesive ranch headquarters with a strong sense of time and place, built for Alberto Trescony, an Italian immigrant stockman whose ranching and land dealings shaped Monterey County agriculture. It also includes an unusual three-aisle transverse adobe barn, described as the only one of its kind in Monterey County and perhaps the state. The form marks local significance.","narrative":"Rancho San Lucas is the headquarters of a working cattle and farming ranch on the west side of the Salinas Valley, southwest of San Lucas in Monterey County. Alberto Trescony, an Italian immigrant stockman, bought the rancho in 1862 and built an adobe ranch house, barn and blacksmith shop in 1865. An adobe bunkhouse and grainery followed in 1888, along with wood-frame stock barns and a small wooden grainery. The ranch house was designed by his wife, Catherine Trescony, and built with local sandstone foundations and a wine cellar. The adobe barn has three aisles and a transverse plan, reported as the only one of its kind in the county. The buildings form a hollow square around an entry road, set in an arroyo among oak-covered hills. Roofs were changed to mission tile in the 1960s, and additions were made to the house through 1973, but the district keeps its overall character. It is listed for its link to Trescony's role in the county's farming economy.","period_of_significance":"1865-1888","architect_builder":"Ranch house designed by Catherine Trescony; work executed by Italian and Indian laborers","architectural_style":"No Style (Other: Transverse Adobe Barn)","criteria":["B"],"status_note":"Working ranch; the blacksmith shop is still in active use. The wooden grainery is in poor condition and the transverse stock barn is described as the least stable.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:54:27.711552-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/lz/electronic-records/rg-079/NPS_CA/91000530.pdf"},"photo":null,"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/123859960","wikipedia":"https://en.wikipedia.org/wiki/Rancho_San_Lucas","wikidata":"https://www.wikidata.org/wiki/Q7291266"},"indexable":true,"url":"https://nationalhistoricalregister.com/california/monterey-county/rancho-san-lucas-91000530/"}