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Aquabike
Duathlon
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Related Sports

Triathlon
Duathlon
Swimrun
Aquabike

Swim types

Swimming
Paddle sports

Related sports

Aquabike
Swimrun

Winter sports

Nordic ice skating
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Adventure race
Obstacle Race
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Race Discovery › Running › Marathon › United States › Colorado

Marathon races in Colorado, United States — 2026 running calendar

19 events found

Running Trail running

Marathon Running United States Colorado

Sport

All running

Running Trail running

All cycling

Cycling Gravel biking Mountain biking

Multisports

Triathlon Duathlon Swimrun Aquabike

Water sports

Swimming Paddle sports

Winter sports

Nordic ice skating Skiing

Other sports

Walking Adventure race Obstacle race Wheelchair

Distance

5K 10K Half-Marathon Marathon Ultra

Race size

Finishers at the most recent edition with results.

Under 100 100 – 500 500 – 1,000 1,000 – 2,500 2,500 – 5,000 5,000 – 10,000 10,000 – 25,000 25,000+

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Race Discovery — The Ultimate Global Race Finder & Results Tracker

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Marathon races in Colorado, United States — 2026 running calendar

Steele Trap Trail Run

Staunton Rocks! Marathon and Half Marathon

Aspen Valley Marathon

2026 CKF Cape Town Marathon

Colfax Marathon

Girls on the Run Rockies Colfax SoleMates 2026

Race Through Colorado 1M, 5K, 10K, 13.1, 26.2 - Now Only $20!