Keystone is a home rule town located in Summit County, Colorado, United States. The town is a part of the Breckenridge, CO Micropolitan Statistical Area. The population of the Keystone census-designated place (CDP) was 1,369 at the United States Census 2020. The Dillon post office (Zip Code 80435) serves Keystone postal addresses. The municipality includes the Keystone Resort and Keystone village. Keystone residents voted to incorporate on March 28, 2023, becoming a municipality on February 8, 2024.

Geography

The Keystone CDP has an area of 107.316 km2, including 0.086 km2 of water.

Demographics

The United States Census Bureau initially defined the Keystone CDP for the United States Census 2000.

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: 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.