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Colorado Half Marathon Calendar 2024-2025

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Explore the best half marathons in Colorado for 2024-2025! Our updated list features 73 exciting races across the state. Find your next race in Colorado below and join the running community at these great events!

September 2025
Sep
20-21
Sa - Su

Pikes Peak Ascent and Marathon

Trail Run 13 mi 26 mi
Sep
20-22
Sa - Mo

Red Feather Trail Jamboree

Trail Run 13 mi 50 km 50 mi
Sep
27
Saturday

Golden Leaf Half Marathon

Trail Run 13 mi
Sep
27-28
Sa - Su

The Bear Chase

Trail Run 5 km 10 km ... 50 mi 100 km
Sep
27
Saturday

Pioneer Prairie Dog Half

5 km 10 km 13 mi
Sep
28
Sunday

Run Boulderthon: The Boulder Marathon

5 km 10 km 13 mi 26 mi
October 2025
Oct
4
Saturday

Rim to Rim Royal Gorge Races

Trail Run 5 km 8 mi 13 mi
Oct
4
Saturday

Colorado Springs Marathon

5 km 13 mi 26 mi
Oct
11
Saturday

The Long View Marathon

5 km 13 mi 26 mi
Oct
11
Saturday

Breckenridge Road Marathon

10 km 13 mi 26 mi
Oct
12
Sunday

Westy Half

5 km 13 mi
November 2025
Nov
2
Sunday

All-Out Kooky-Spooky

5 km 10 km 21 km
Nov
15
Saturday

Louisville Trail Race

Trail Run 5 km 10 km 13 mi