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Colorado Running Calendar 2025-2026

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Explore the best running races in Colorado for 2025-2026! Our updated list features 272 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

Half Marathons Marathons Trail Runs Triathlons
October 2026
Oct
3
Saturday

Colorado Springs Marathon

5 km Half Marathon Marathon
Oct
3
Saturday

I Can 5k

5 km
Oct
3
Saturday

Sage Burner Trail Run

Trail Run 15 km
Oct
3-4
Sa - Su

The Bear Chase

Trail Run 5 km 10 km ... 50 mi 100 km
Oct
4
Sunday

Windsor Marathon

5 km 10 km Half Marathon Marathon
Oct
10
Saturday

Manitou 5K

5 km
Oct
17
Saturday

Indian Creek Trail Runs

Trail Run 5 mi 15 mi 55 km 50 mi
Oct
24
Saturday

Hoofin' It Through the Hollows

5 km
Oct
25
Sunday

Ghosts and Goblins 10K

5 km 10 km
Oct
25
Sunday

Odyssey Odyssey

5 km
November 2026
Nov
7
Saturday

Turkey Trails Denver

5 km 10 km Half Marathon
Nov
7
Saturday

City Park Classic 10k

5 km 10 km
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