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Discover The Best Marathons in Colorado for 2026

Browse our listing of marathons in Colorado to find one that suits your goals. Plus, get training tips.

For a full list of events, check out our calendar.

upcoming marathons in Colorado

Valkyrie Trail Race
May 9, 2026
/
Colorado Springs
Endure Trail Runs
May 16, 2026
/
Summits Trail Runs
June 6, 2026
/
Silverton Alpine Runs
July 18, 2026
/
Silverton
Aspen Valley Marathon
July 18, 2026
/
Aspen
Pikes Peak Marathon + Ascent
September 19, 2026
/
Colorado Springs
Fall Equinox Marathon, Half Marathon & 5 Mile
September 20, 2026
/
Fort Collins
The Elevation Everest Race
September 26, 2026
/
Winter Park
Boulderthon, presented by PUMA
September 27, 2026
/
Boulder
Colorado Springs Marathon, Half, 5K, and Kids K
October 3, 2026
/
Colorado Springs
See all races →

featured events

Yakima River Canyon Marathon and Half-Marathon
Mar 28, 2026
/
Yakima
Corvallis Half Marathon & 5K
Apr 11, 2026
/
Corvallis
Training Plans

Looking for training programs for Half Marathon to Ultramarathon? Check out our plans on RaceCenter and Outfurther Coaching.

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