Welcome to TurnKey Summit County, CO! Summit County is nestled in the heart of the Colorado Rockies and is home to FOUR world-class ski mountains: Breckenridge, Keystone, Arapahoe Basin and Copper Mountain, along with the quaint mountain towns of Frisco, Dillon and Silverthorne. Summit County is a booming Rocky Mountain vacation destination with renowned snow skiing, golfing, fishing, hiking, bicycle paths, summer festivals featuring live music, barbecues, shopping, dancing and much, much more. Winter and Summer enthusiasts alike will find an adventure around every corner in Summit County. Welcome to Colorado’s playground!