During ski season, thousands of people flock to the Dillon Reservoir area. Dillon Reservoir is close to four ski resorts. Arapahoe Basin is medium-sized resort that is approximately ten miles from the lake. Keystone Ski Resort is a large tourist destination that is located approximately five miles away. Breckenridge, which is one of the largest ski resorts in Colorado, is located approximately seven miles from Dillon Reservoir. Copper Mountain is located approximately eight miles from Dillon Reservoir. These resorts stay open all year round.