Rancho La Purísima Concepción was a 4,439-acre (17.96 km2) Mexican land grant in present day Santa Clara County, California given in 1840 by Governor Juan Alvarado to José Gorgonio and his son José Ramon, Ohlone Indians. The granted extended from Matadero Creek (Rancho Corte de Madera) to Adobe Creek and encompassed present day Los Altos Hills.