Rancho Los Carneros was a 1,629-acre (6.59 km2) Mexican land grant in present day Monterey County, California given in 1842 by Governor Juan B. Alvarado to María Antonia Linares.
The grant was near the San Benito County, California line and south of Rancho Cañada de la Carpenteria.
His widow, Maria Antonia Castro de Anzar, married Frederick A. McDougall (a doctor from Scotland).
With the cession of California to the United States following the Mexican-American War, the 1848 Treaty of Guadalupe Hidalgo provided that the land grants would be honored.
As required by the Land Act of 1851, a claim for Rancho Los Carneros was filed with the Public Land Commission in 1853,[4][5] and the grant was patented to Frederick A. MacDougall, Anatolio Anzar, Juan Francisco Anzar and Policronio Anzarin 1862.