Echo Lake, is the name of a glacial lake—summer reservoir located in El Dorado County, eastern California, United States. Geography Echo Lake is in the Sierra Nevada, and within the El Dorado National Forest. The lake is approximately from Highway 50 at Echo Summit. The lake is divided into two sections; an Upper lake, and a Lower lake. The elevation of Echo lake is maintained in summer months with a dam at above sea level. There has been little development beyond lakeside cabins. See also List of lakes in California References External links Lakes of the Sierra Nevada (United States) Eldorado National Forest Lakes of El Dorado County, California Lakes of California Lakes of Northern California Reservoirs in California