Upcoming Marathon Races Near Boulder, CO

Name: Race in the Clouds - Alma Dirt Festival 2026
Start: 2026-06-27
End: 2026-06-27
Location: Alma

The Long View Marathon

Fort Collins, CO

Saturday, October 11th, 2025

Featured

Marathon

Half

View details for race The Long View Marathon

Want to feature your race?

Get your race seen first by thousands of runners

Learn More

Learn how to feature your race

Blue Sky Marathon & Half

Fort Collins, CO

Saturday, October 18th, 2025

Half

Marathon

View details for race Blue Sky Marathon & Half

Runs With Scissors Races

Brighton, CO

Saturday, April 25th, 2026

Half

Marathon

Ultra

View details for race Runs With Scissors Races

The Colorado Marathon

Fort Collins, CO

Sunday, May 3rd, 2026

Marathon

Half

10K

View details for race The Colorado Marathon

Race in the Clouds - Alma Dirt Festival 2026

Alma, CO

Saturday, June 27th, 2026

Marathon

Half

1 Mile

Trail

Fast

View details for race Race in the Clouds - Alma Dirt Festival 2026

Explore more in Boulder, CO

Distances:

5K 10K Half Marathon Marathon

Months:

October November December

Tags:

Trail Boston Qualifiers Fast Courses

State:

All Colorado races

Don't see your race? Add it!

Add Your Race (Free)