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, Colorado a hillside was set aside for the current townsite, which is now situated on the shoreline of Dillon Reservoir. Dillon is located at (39.627659, -106.044199). According to the United States Census Bureau, the town has a total area of , of which, of it is land and of it (35.71%) is water. Dillon Dam and its reservoir (Lake Dillon) are nearby. The continental divide is approximately east. According to the Köppen climate classification, Dillon has an alpine subarctic climate "(Dfc)". As of the census of 2000, there were 802 people, 369 households, and 195 families residing in the town. The