Endurance Races in Colorado, United States 2026 144 events
Browse upcoming endurance races in United States. Find dates, distances, and registration links.
Upcoming races
RunningIn 9 days
Cirque Series - Arapahoe Basin, CO
◎ Keystone, USA▤ Sep 5, 2026
RunningIn 9 days
Creede Mountain Run
◎ Creede, USA▤ Sep 5, 2026
RunningIn 9 days
Demon Dash
◎ Arvada, USA▤ Sep 5, 2026
RunningIn 9 days
Break Your Neck: Walk, Run, or Roll
◎ Pueblo, USA▤ Sep 5, 2026
RunningIn 10 days
10k at 10,000 Feet
◎ Steamboat Springs, USA▤ Sep 6, 2026
10 km
RunningIn 10 days
Broncos 7K
◎ Denver, USA▤ Sep 6, 2026
7 km
RunningIn 2 weeks
14th Annual Superhero Event
◎ Greeley, USA▤ Sep 10-27, 2026
RunningIn 2 weeks
American Heroes Run
◎ Longmont, USA▤ Sep 11-12, 2026
TriathlonIn 2 weeks
2026 Lake Nighthorse Triathlon - Sprint and Olympic
◎ Durango, USA▤ Sep 12, 2026
1.5 km / 40 km / 10 km
RunningIn 2 weeks
53rd Annual Imogene Pass Run
◎ Telluride, USA▤ Sep 12, 2026
RunningIn 2 weeks
6 Dot Dash
◎ Littleton, USA▤ Sep 12, 2026
RunningIn 2 weeks
Black Squirrel Half Marathon
◎ Bellvue, USA▤ Sep 12, 2026
21.1 km
RunningIn 2 weeks
CASA Superhero Run
◎ Glenwood Springs, USA▤ Sep 12, 2026
RunningIn 2 weeks
2026 RiNo 5K + Larimer Mile
◎ Denver, USA▤ Sep 12, 2026
5 km
RunningIn 2 weeks
Gleneagle Spirit 5K Run, Walk, and Kids Fun Run
◎ Colorado Springs, USA▤ Sep 12, 2026
5 km
RunningIn 2 weeks
NEDNED Trail Fest
◎ Nederland, USA▤ Sep 12, 2026
RunningIn 2 weeks
National Chocolate Day: Run for Chocolates 5K/10K/13.1 DENVER/AURORA
◎ Aurora, USA▤ Sep 12, 2026
5 km
RunningIn 2 weeks
Run for Mental Health 5K/10K/13.1 DENVER/AURORA
◎ Aurora, USA▤ Sep 12, 2026
5 km
RunningIn 2 weeks
Devil on the Divide
◎ Empire, USA▤ Sep 12, 2026
RunningIn 2 weeks
Snow Mountain Ranch
◎ Granby, USA▤ Sep 12, 2026