Endurance Races in Colorado, United States 2026 105 events
Browse upcoming endurance races in United States. Find dates, distances, and registration links.
Upcoming races
RunningIn 9 days
CG Adventure Club - Elevation Everest
◎ Winter Park, USA▤ Sep 23-27, 2026
RunningIn 11 days
Boggy Draw Bear Chase
◎ Dolores, USA▤ Sep 25, 2026
TriathlonIn 12 days
25th Annual Black Canyon Triathlon
◎ Montrose, USA▤ Sep 26, 2026
RunningIn 12 days
24 Hours of Palmer Lake
◎ Palmer Lake, USA▤ Sep 26, 2026
RunningIn 12 days
Crested Butte Ultra
◎ Crested Butte, USA▤ Sep 26, 2026
RunningIn 12 days
WILD Wahatoya Runs
◎ La Veta, USA▤ Sep 26, 2026
RunningIn 12 days
Deep Creek Trail Half Marathon
◎ Telluride, USA▤ Sep 26, 2026
21.1 km
CyclingIn 12 days
Denver Rotary Club Cycling to Serve 2026
◎ Denver, USA▤ Sep 26, 2026
RunningIn 12 days
Run for Donuts 5K/10K/13.1 DENVER/AURORA
◎ Aurora, USA▤ Sep 26, 2026
5 km
RunningIn 13 days
Colorado Coyotes Youth XC Invitational
◎ Cenennial, USA▤ Sep 27, 2026
RunningIn 13 days
14er Fest 14K & 5K
◎ Buena Vista, USA▤ Sep 27, 2026
14 km
RunningIn 3 weeks
The Bear Chase
◎ Lakewood, USA▤ Oct 3-4, 2026
RunningIn 3 weeks
Above the Clouds Ultra
◎ Woodland Park, USA▤ Oct 3, 2026
RunningIn 3 weeks
Sage Burner Trail Race
◎ Gunnison, USA▤ Oct 3, 2026
RunningIn 3 weeks
Grand Valley Backyard
◎ Loma, USA▤ Oct 3, 2026
RunningIn 3 weeks
Big Waves Family 5K run/walk Presented by Brumate
◎ Westminster, USA▤ Oct 3, 2026
5 km
RunningIn 3 weeks
Colorado Springs Marathon, Half, 5K, and Kids K
◎ Colorado Springs, USA▤ Oct 3, 2026
42.2 km
RunningIn 3 weeks
Rut Run 5k
◎ Estes Park, USA▤ Oct 3, 2026
5 km
RunningIn 3 weeks
West Elk Challenge
◎ Crawford, USA▤ Oct 3, 2026
RunningIn 3 weeks
Boulder Marathon
◎ Boulder, USA▤ Oct 4, 2026
42.195 km