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Colorado Half Marathon Calendar 2025-2026

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Explore the best half marathons in Colorado for 2025-2026! Our updated list features 95 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

June 2026
Jun
27
Saturday

Race in the Clouds - Alma Dirt Festival

Trail Run 6 mi 13 mi
July 2026
Jul
4
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Jul
11
Saturday

All-Out Dog Days

5 km 10 km Half Marathon
Jul
11
Saturday

Bodies Race Company - Denver

5 km 10 km Half Marathon
Jul
12
Sunday

Bodies Race Company - Colorado Springs

5 km 10 km Half Marathon
Jul
18
Saturday

Summer Splash Prairie Dog Half

5 km 10 km Half Marathon
Jul
19
Sunday

Barr Trail Mountain Race

Trail Run 13 mi
Jul
19
Sunday

Aspen Valley Marathon

5 km Half Marathon Marathon
Jul - Aug
31-1
Fr - Sa

Rocky Mountain Half Marathon

5 km Half Marathon
August 2026
Aug
1
Saturday

Sheep Mountain Ultras

Trail Run Half Marathon 50 km 50 mi
Aug
1
Saturday

Aspen Backcountry Marathon

Trail Run Half Marathon Marathon 50 km
Aug
8
Saturday

Run The Rockies Trail Race

Trail Run 5 km 10 km Half Marathon
Aug
8
Saturday

All-Out Runapalooza

5 km 10 km Half Marathon
Aug
8-9
Sa - Su

Emerald Mountain Epic

Trail Run 13 mi 26 mi
Aug
15
Saturday

Mt. Sneffels Marathon

10 km Half Marathon
Aug
16
Sunday

Erie Half

5 km Half Marathon
Aug
22
Saturday

Byers Peak Stampede Half Marathon

Trail Run 5 km Half Marathon
Aug
23
Sunday

Pioneer Prairie Dog Half

5 km 10 km Half Marathon
September 2026
Sep
5
Saturday

Bodies Race Company - Denver

5 km 10 km Half Marathon
Sep
6
Sunday

Bodies Race Company - Colorado Springs

5 km 10 km Half Marathon
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