Dillon Reservoir Dillon Reservoir Dillon Reservoir, sometimes referred to as Lake Dillon, is a large fresh water reservoir located in Summit County, Colorado, south of I-70 and bordered by the towns of Frisco, Silverthorne, and Dillon. It is a reservoir for the city of Denver, and its waters are under the control of Denver Water. Popular ski areas are close to the reservoir, including Copper Mountain, Keystone, Arapahoe Basin, and Breckenridge. In 1859, a large party of gold-seekers led by Ruben Spalding discovered gold near the headwaters of the Blue River, which prompted a population surge in Summit County, Colorado. By October
Dillon Beach, California Dillon Beach, California Dillon Beach is a census-designated place (CDP) in Marin County, California, United States. Dillon Beach is located west of Tomales, at an elevation of 89 feet (27 m). The population was 283 at the 2010 census. Dillon Beach was named after the founder, George Dillon, who settled there in 1858. The area includes a public access beach, as well as a private beach resort, the only private beach in California. Dillon Beach is located near the mouth of Tomales Bay, at . The Estero de San Antonio State Marine Recreational Management Area is a marine protected area