Rancho El Pinole was a 17,761-acre (71.88 km2) Mexican land grant along Carquinez Strait in present-day Contra Costa County, California.
It was given in 1842 by Governor Juan Alvarado to Ygnacio Martinez, a Californio military commander and politician.[1] Rancho El Pinole extended over land that today includes most of the Franklin Ridge and towns of Crockett, Hercules, Martinez, Oleum, Pinole, Rodeo, Selby and Tormey.[2]