Keystone is an unincorporated community and a census-designated place (CDP) located in and governed by Summit County, Colorado, United States. The CDP is a part of the Breckenridge, CO Micropolitan Statistical Area. The population of the Keystone CDP was 1,079 at the United States Census 2010. The Dillon post office serves Keystone postal addresses. The Keystone CDP includes the Keystone Resort and Keystone village. Geography The Keystone CDP has an area of , including of water. Demographics The United States Census Bureau initially defined the for the Keystone Resort Keystone Resort was originally constructed in the 1970s by the Ralston Purina Company. It is now owned by Vail Resorts. The Keystone Resort ski area occupies 3 separate mountains: Dercum Mountain, North Peak, and The Outback. Recent expansion of terrain and services offers snowcat skiing in Independence Bowl, Bergman Bowl, Erickson Bowl, in addition to the existing North Bowl and South Bowl on Wapiti Peak. The resort has many summer and winter outdoor activities. The winter activities include alpine skiing, snowboarding, tubing, ice-skating, cross-country skiing, horse-drawn sleigh ride dinners, and snowmobiling. The summer activities include hiking, mountain biking, fishing, trail running, golf on two championship courses, and paddle boating on Keystone Lake. The Keystone ski area has: vertical Base elevation: Summit elevation: 131 trails Degree of difficulty percentages for trails: Easiest-14 percent, More Difficult-29 percent, Most Difficult-57 percent 20 Lifts including 2 gondolas, 2 express six-pack and 4 high speed quads. The only Night skiing in the area. Keystone is only a short drive from other resorts in Summit County - about 10 minutes to Arapaho Basin, 20 minutes to Breckenridge, and 20 minutes to Copper Mountain. See also Outline of Colorado Index of Colorado-related articles State of Colorado Colorado cities and towns Colorado census designated places Colorado counties Colorado metropolitan areas Silverthorne, CO Micropolitan Statistical Area White River National Forest Keystone Resort References External links Keystone, Colorado Keystone @ Colorado.com Keystone @ UncoverColorado.com Keystone @ SummitCove.com Keystone Resort website Summit County website White River National Forest website Census-designated places in Summit County, Colorado Census-designated places in Colorado