Keystone Resort

Keystone Resort is the largest ski resort in Summit County located in Keystone, Colorado, United States. It was founded on November 21, 1970 by Max Dercum. The resort is owned and operated by Vail Resorts which also operates three other resorts in the state (Vail, Beaver Creek, and Breckenridge) and Heavenly Ski Resort and Northstar at Tahoe at Lake Tahoe.

Keystone consists of three mountains named Dercum Mountain, North Peak, the Outback, and five Bowls (Independence, Erickson, Bergman, North and South Bowls) for skiing at every level. The first three mountains mentioned connected by a series of ski lifts and gondolas. Collectively, the mountains form the largest operation in Colorado to offer night skiing, where several trails are lit by large floodlights, and lift operation can run until late into the night. Night skiing takes place after sunset until as late as 9 p.m. on as many as 15 of the resort's trails.

Keystone is known also for its five-acre resurfaced skating lake, sleigh rides and many Zagat-rated four- and five-star restaurants. There are over 3,000 condos in Keystone, all within a short walk or free shuttle ride to one the two base areas called River Run (newest) and Mountain House (Original, less crowded).

In summer, Keystone also is a home for lift access mountain biking, biking parks, and hundreds of miles of single-track mountain biking.