Box-o-Rox Trail

The Green Mountain Summit Loop delivers a difficult mountain biking challenge, spanning 8.7 miles (14.0 km) with a significant 825 feet (251 metres) of elevation gain. You will navigate varied terrain, from enjoyable rolling singletrack to a steep climb towards the summit. Along the way, you can pause at several turnoffs to take in distant views of Denver, making the effort worthwhile before a fairly steep and winding descent with some loose rocks.

Plan your visit to William F. Hayden Park, where you can access the Green Mountain Summit Loop from multiple parking areas. This route is typically ridden clockwise, which provides a continuous ride around the perimeter of the trail system. Allow approximately 1 hour and 21 minutes to complete the loop, ensuring you have enough time to enjoy the ride without rushing.

This loop is a standout option for mountain bikers seeking a demanding ride within William F. Hayden Park. The combination of its challenging ascent, technical descent, and the panoramic views of Denver from the summit makes it a memorable experience. It's a great way to test your skills and endurance on a well-defined route.