Endurance Races in Colorado, United States 2026 140 events
Browse upcoming endurance races in United States. Find dates, distances, and registration links.
Upcoming races
RunningIn 4 weeks
WILD Wahatoya Runs
◎ La Veta, USA▤ Sep 26, 2026
RunningIn 4 weeks
Deep Creek Trail Half Marathon
◎ Telluride, USA▤ Sep 26, 2026
21.1 km
CyclingIn 4 weeks
Denver Rotary Club Cycling to Serve 2026
◎ Denver, USA▤ Sep 26, 2026
RunningIn 4 weeks
14er Fest 14K & 5K
◎ Buena Vista, USA▤ Sep 27, 2026
14 km
RunningIn 4 weeks
Colorado Coyotes Youth XC Invitational
◎ Cenennial, USA▤ Sep 27, 2026
RunningIn 5 weeks
The Bear Chase
◎ Lakewood, USA▤ Oct 3-4, 2026
RunningIn 5 weeks
Above the Clouds Ultra
◎ Woodland Park, USA▤ Oct 3, 2026
RunningIn 5 weeks
Sage Burner Trail Race
◎ Gunnison, USA▤ Oct 3, 2026
RunningIn 5 weeks
Grand Valley Backyard
◎ Loma, USA▤ Oct 3, 2026
RunningIn 5 weeks
Big Waves Family 5K run/walk Presented by Brumate
◎ Westminster, USA▤ Oct 3, 2026
5 km
RunningIn 5 weeks
Colorado Springs Marathon, Half, 5K, and Kids K
◎ Colorado Springs, USA▤ Oct 3, 2026
42.2 km
RunningIn 5 weeks
Rut Run 5k
◎ Estes Park, USA▤ Oct 3, 2026
5 km
RunningIn 5 weeks
West Elk Challenge
◎ Crawford, USA▤ Oct 3, 2026
RunningIn 5 weeks
Boulder Marathon
◎ Boulder, USA▤ Oct 4, 2026
42.195 km
RunningIn 6 weeks
Bagel Run 5K/10K/13.1 DENVER/AURORA
◎ Centennial, USA▤ Oct 10, 2026
5 km
RunningIn 6 weeks
Breckenridge RunFest
◎ Breckenridge, USA▤ Oct 10-11, 2026
RunningIn 6 weeks
Dialysis Dash 5K
◎ Grand Junction, USA▤ Oct 10, 2026
5 km
CyclingIn 6 weeks
Grassroots Gravel
◎ Pueblo, USA▤ Oct 10, 2026
RunningIn 6 weeks
Durango Marathon
◎ Durango, USA▤ Oct 11, 2026
42.2 km
RunningIn 7 weeks
Bobcat Trail Races
◎ Colorado Springs, USA▤ Oct 17, 2026