Folsom Lake is a reservoir located in Northern California, fed by the American River. Its history dates back to the 1950s, when it was built as part of the Central Valley Project to provide water for agriculture and urban areas. The hydrology of the lake is controlled by the Folsom Dam, which regulates water flows for flood control and hydroelectric power. The lake receives water from various sources, including the American River, several creeks and streams, and snowpack from the Sierra Nevada Mountains. The lake is used for recreational activities such as boating, fishing, and camping, and also serves as a critical water source for agriculture in the region. However, in recent years, the lake has faced challenges due to droughts and water shortages, impacting both agricultural and recreational uses.