The route of the "Triple By-Pass" put on by Team Evergreen every year. From their site:
"120 miles from Evergreen to Avon over Squaw (11,140 ft.), Loveland (11,990 ft.), Swan Mountain and Vail (10,560 ft.) passes, with over 10,000 ft. of lung-busting gain in elevation"
Parking is available at Bergen various lots in the Bergen Park area