Endurance Races in CO, United States 2026
Browse upcoming endurance races in United States. Find dates, distances, and registration links.
207 upcoming races
Upcoming Races
Running
West Elk Challenge
Oct 3, 2026Crawford, USA
Running
Boulder Marathon
Oct 4, 2026Boulder, USA
Run 42 m
Running
Bagel Run 5K/10K/13.1 DENVER/AURORA
Oct 10, 2026Centennial, USA
Run 5 m
Running
Breckenridge RunFest
Oct 10-11, 2026Breckenridge, USA
Running
Dialysis Dash 5K
Oct 10, 2026Grand Junction, USA
Run 5 m
Cycling
Grassroots Gravel
Oct 10, 2026Pueblo, USA
Running
Durango Marathon
Oct 11, 2026Durango, USA
Run 42 m
Running
Bobcat Trail Races
Oct 17, 2026Colorado Springs, USA
Running
Blue Sky Trail Marathon & Half Marathon
Oct 17-18, 2026Fort Collins, USA
Run 42 m
Running
Apex Foundation Trick or Trot 5K & Halloween Hunt
Oct 24, 2026Arvada, USA
Run 5 m
Running
Bridge Burner Ultra
Oct 24, 2026Canon City, USA
Running
Beware the Bear Trail Races
Oct 25, 2026Lakewood, USA
Running
Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA
Oct 31, 2026Aurora, USA
Run 5 m
Running
PB&J Fuel Run 5K/10K/13.1 DENVER/AURORA
Oct 31, 2026Aurora, USA
Run 5 m
Running
All-Out Kooky-Spooky
Nov 1, 2026Golden, USA
Running
Marathon At The MAC
Nov 7, 2026Castle Rock, USA
Run 42 m
Running
Kessel Run Ultra
Nov 7, 2026Fruita, USA
Running
Alamosa Veterans Memorial Park Race
Nov 7, 2026Alamosa, USA
Running
Bell Ringer 2 Miler
Nov 7, 2026Loveland, USA
Running
City Park Classic (5k/10k & 1 Mile Walk of Hope for Pancreatic Cancer Research)
Nov 7, 2026Denver, USA
Run 5 m