Historical Marker
Mariano Castro Adobe
Historical marker location:
110 North Rengstorff Avenue, Mountain View, California
( Marker is at the intersection of North Rengstorff Avenue and Central Expressway, on the right when traveling south on North Rengstorff Avenue.)
California was the site of the nation's first successful oil well in 1892. The well was drilled in the city of Los Angeles and produced about 25 barrels of oil a day. Today, California remains a major oil-producing state.