Marathons in Colorado 2026 | Upcoming Races & Dates | My Next Race

There are 14 marathons in Colorado scheduled for 2026. The next is the Steele Trap Trail Run in Loma on September 12. Colorado marathons run primarily September through August.

Steele Trap Trail Run

Sat, Sep 12 · Loma, CO Loma

Steele Trap Trail Run

From $50 Open

RMRR Fall Marathon Training Series #2

Sun, Sep 13 · Thornton, CO Thornton

RMRR Fall Marathon Training Series #2 - 20kmRMRR Fall Marathon Training Series #2 - 30km

From $20 Open Closing Soon

Beulah Challenge and OverIt Series

Sat, Sep 19 · Beulah, CO Beulah

5K5K - Age 17 & Under10K +4

From $20 Open Closing Soon 1 spots left

Pikes Peak Marathon

Sun, Sep 20 · Manitou Springs, CO Manitou Springs

Half Priced Award EntryMarathon

From $100 Open Closing Soon

CG Adventure Club - Elevation Everest

Wed, Sep 23 · Winter Park, CO Winter Park

All-In Adventure PackageBasic Experience PackageStarter Adventure Package

From $150 Open

Colorado Springs Marathon, Half, 5K, and Kids K

Sat, Oct 3 · Colorado Springs, CO Colorado Springs

Kids KVirtual Kids KVirtual 5K +16

From $0 Open 20 spots left

Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run

Sun, Oct 4 · Windsor, CO Windsor

1 Mile Fit & Fun Run5K10K +2

From $20 Open

Breckenridge RunFest

Sat, Oct 10 · Breckenridge, CO Breckenridge

Kids & Family Mile5K10K +2

From $25 Open

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

Durango Marathon

Sun, Oct 11 · Durango, CO Durango

Durango Half MarathonDurango MarathonDurango Marathon Weekend 5k

From $20 Open

Alley Loop

Sat, Jan 30 · Crested Butte, CO Crested Butte

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

From $25 Closed 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

Bound for Boston Marathon & Half Marathon - Denver

Sun, Aug 1 · Denver, CO Denver

Half MarathonVirtual Half MarathonHalf Marathon +5

From $25 Closed