The Kern Front Oil Field is a large oil and gas field in the lower Sierra Nevada foothills in Kern County, California. Discovered in 1912, and with a cumulative production of around 210 million barrels (33,000,000 m³) of oil, it ranks 29th in size in the state, and is believed to retain approximately ten percent of its original oil (approximately 22 million barrels), according to the official estimates of the California Department of Oil, Gas, and Geothermal Resources (DOGGR).