This is Lake Dillon; the dam that created it and the town of Silverthorne below. Dillon Dam (5,888 feet long by 231 feet high) creates the largest water storage facility for the Denver metropolitan area. The project diverts water from the Blue River Basin on the Western Slope of Colorado through the Harold D. Roberts Tunnel under the Continental Divide into the South Platte River Basin. Dam construction was finished and the new lake began to fill in September, 1963. Click here to see a photo of Lake Dillon (and a lot of other stuff) from the top of Buffalo Mountain.