Endurance Races in Colorado, United States 2026 133 events
Browse upcoming endurance races in United States. Find dates, distances, and registration links.
Upcoming races
Running
Denver, CO Galloway Training Program
◎ Denver, USA▤ Jul 18 - Jan 16, 2027
RunningToday
Aug 27 - All groups @ Red Rocks (different meeting point for Adv) - 5:30 pm start!
◎ Colorado Springs, USA▤ Aug 27, 2026
RunningIn 2 days
Rock Hawk
◎ Castle Rock, USA▤ Aug 29, 2026
RunningIn 2 days
Continental Divide Trail Run
◎ Steamboat Springs, USA▤ Aug 29, 2026
RunningIn 2 days
Ouray 50 Mile Endurance Run
◎ Ouray, USA▤ Aug 29, 2026
80.5 km
RunningIn 2 days
Run for Breast Cancer 5K/10K/13.1 DENVER/AURORA
◎ Aurora, USA▤ Aug 29, 2026
5 km
RunningIn 3 days
Bluffs Run 8K
◎ Lone Tree, USA▤ Aug 30, 2026
8 km
RunningIn 3 days
Wine Run 5k at The Winery at Holy Cross Abbey
◎ Cañon City, USA▤ Aug 30, 2026
5 km
RunningIn 7 days
Front Range Ultra Dayze
◎ Loveland, USA▤ Sep 3-7, 2026
RunningIn 9 days
12 Hours of Mesa Verde
◎ Cortez, USA▤ Sep 5, 2026
RunningIn 9 days
Creede Mountain Run
◎ Creede, USA▤ Sep 5, 2026
RunningIn 9 days
Cirque Series - Arapahoe Basin, CO
◎ Keystone, 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
Broncos 7K
◎ Denver, USA▤ Sep 6, 2026
7 km
RunningIn 10 days
10k at 10,000 Feet
◎ Steamboat Springs, USA▤ Sep 6, 2026
10 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
Devil on the Divide
◎ Empire, USA▤ Sep 12, 2026