Marathons in Colorado 2026 | Upcoming Races & Dates

There are 8 marathons in Colorado scheduled for 2026. The next is the The Long View Marathon in Fort Collins on October 10. Colorado marathons run primarily October through August.

Breckenridge RunFest

Sat, Oct 10 · Breckenridge, CO Breckenridge

Kids & Family Mile5K10K +2

From $25 Open Closing Soon

The Long View Marathon

Sat, Oct 10 · Fort Collins, CO Fort Collins

The Long View 5kThe Long View Half MarathonThe Long View Marathon

From $35 Open Closing Soon

Mission Crew Miles

Fri, Jan 1 · Anywhere, CO Anywhere

Mission Crew Miles Together

From $37 Open

Alley Loop

Sat, Jan 30 · Crested Butte, CO Crested Butte

1.5K Freestyle | Kids Race3K Freestyle | Kids Race5K Freestyle +6

From $25 Open 15 spots left

Gothic Mountain Tour

Sun, Feb 14 · Crested Butte, CO Crested Butte

Recreational CourseCompetitive Course

From $100 Closed 95 spots left

The Colorado Marathon

Sun, May 2 · Fort Collins, CO Fort Collins

2027 10k5K5K +9

From $35 Open

The Steamboat Marathon

Sun, Jun 6 · Steamboat Springs, CO Steamboat Springs

10K10KHalf Marathon +3

From $65 Open

Bound for Boston Marathon & Half Marathon - Denver

Sun, Aug 1 · Denver, CO Denver

Half MarathonVirtual Half MarathonHalf Marathon +5

From $25 Closed

Marathons in Colorado — 2026

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