West of Aspen and northeast of Snowmass Village, the Sky Mountain Park Loop is an 11 mile route that is popular with local mountain bikers. There is 1,300 feet of rolling ascent around the loop. There is an extension from the loop that runs east towards Aspen and dumps out on Owl Creek Road near the airport.
To reach the Snowmass trailhead from downtown Aspen, head west on SR82 for 6 miles. Turn left on Brush Creek Road for 4.0 miles toward the Snowmass Village Mall. Look for parking on the right just past the rodeo grounds.
Overall, Sky Mountain Park Loop is the 175th most popular mountain bike trail of all 176 mountain biking rides in Colorado.