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

There are 14 marathons in Colorado scheduled for 2026. The next is the 14er Challenge in Buena Vista on July 23. Colorado marathons run primarily July through May.

Expedition Maroon Bells

Sat, Jul 18 · Aspen, CO Aspen

Freedom Expedition Leadership TeamFreedom Expedition DepositFreedom Expedition

From $0 Closed 6 spots left

14er Challenge

Thu, Jul 23 · Buena Vista, CO Buena Vista

14er Challenge 2026

From $249 Closed 25 spots left

World Championship Pack Burro Race

Sun, Jul 26 · Fairplay, CO Fairplay

Short Course, approximately 12.3 milesLong Course, 29+ miles

From $70 Open Closing Soon

Bound for Boston Marathon & Half Marathon - Denver

Sun, Aug 2 · Denver, CO Denver

Virtual Half MarathonHalf MarathonMarathon +1

From $25 Open Closing Soon

Staunton Rocks! Marathon and Half Marathon

Sat, Aug 22 · Pine, CO Pine

Staunton Rocks! Half MarathonStaunton Rocks! Marathon

From $90 Open

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

Pikes Peak Marathon

Sun, Sep 20 · Manitou Springs, CO Manitou Springs

Half Priced Award EntryMarathon

From $100 Open

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 K2027 Colorado Springs 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 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

Breckenridge RunFest

Sat, Oct 10 · Breckenridge, CO Breckenridge

Kids & Family Mile5K10K +2

From $25 Open

Durango Marathon

Sun, Oct 11 · Durango, CO Durango

Durango Half MarathonDurango MarathonDurango Marathon Weekend 5k

From $20 Open

The Colorado Marathon

Sun, May 2 · Fort Collins, CO Fort Collins

2027 10k5K5K +9

From $35 Closed