12-Hour Mountain Bike Endurance Challenge
Test your limits on a 6.5-mile loop that winds through rolling hills and drainages at Philip S. Miller Park. This is pure endurance racing where you'll tackle 90% single-track terrain for 12 straight hours, either solo or with your team.
- 12-hour endurance format with professional lap timing
- 6.5-mile counter-clockwise loop with frequent passing zones
- 90% single-track, 10% dirt road through hills and drainages
- Individual and team categories available
- Location: Castle Rock, Colorado