Lake Amador is a reservoir located in Amador County, California. It lies at an elevation of 325 feet. The lake's water is impounded by the Jackson Creek Dam, a 193 ft tall earth-and-rock dam, built in 1965 across Jackson Creek. The dam is 1140 ft long and 11 ft wide and contains 1223000 cuyd of material. Its crest is 481 ft about sea level, and it belongs to the Jackson Valley Irrigation District. The reservoir's capacity is 22000 acre.ft. Lake Amador was the site of the Gold Rush rock music festival on October 4, 1969. Performers included Ike & Tina Turner, Santana, Bo Diddley, Albert Collins, and Taj Mahal.