Echo Summit is a mountain pass over the Sierra Nevada in the western United States, located in eastern El Dorado County, California. At 7,377 ft above sea level, it is the highest point on U.S. Route 50 in California, which traverses it at postmile 66.48 between Twin Bridges and Meyers, south of Lake Tahoe. The "Sierra Nevada Southern Route" of the Lincoln Highway, the first road across the United States, was routed over nearby Johnson Pass in 1913.