Folsom Dam

Folsom Lake was created in 1955 by Folsom Dam, a concrete dam flanked by earth wing dams and dikes with a total length of about 9 miles. The lake features some 10,000 surface acres of water when full and has 75 miles of shoreline. It extends about 15 miles up the north fork, and about 10 1/2 miles up the south fork of the American River. The Lake level normally varies from 466 feet elevation in early summer to a low of 426 feet in early winter.