Rancho San Francisco, Mexican land grant in Los Angeles County and Ventura County, California, United States
Rancho San Francisco was a 48,612-acre (19,670-hectare) land grant in northwestern Los Angeles County located at the junction where Castaic Creek meets the Santa Clara River. The property contained extensive pastures and farmland with an adobe headquarters built in 1804.
Governor Juan B. Alvarado granted the land to Antonio del Valle in 1839 as recognition for military service to Alta California. This award reflected the Mexican government's practice of granting large properties to military officers for their loyalty and service.
The Tataviam people originally lived in the Santa Clarita Valley before being moved by mission administrators to support farming and cattle raising. The rancho became a gathering point and supply center for travelers passing through the region.
The property sits in a semi-dry valley with seasonal water sources from the two rivers. Visitors should plan for extended walking or hiking since historical sites are spread across a large area.
Francisco López discovered gold beneath an oak tree in Placerita Canyon in 1842, marking the first documented gold finding in Southern California. This discovery happened years before the major gold rush and soon brought prospectors to the area.
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