Colorado Obstacle Race Calendar 2025-2026

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Explore the best obstacle runs in Colorado for 2025-2026! Our updated list features 278 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

June 2026
Jun
20
Saturday

Unicorn 5k - Thornton

5 km
Jun
20
Saturday

Red, White and Brew Half Marathon

5 km 10 km 21 km 12 hr
Jun
20
Saturday

San Juan Solstice 50 Mile

Trail Run 50 mi
Jun
21
Sunday

Father's Day Classic 10k

5 km 10 km
Jun
27
Saturday

The John Cappis

Trail Run 50 km
Jun
27
Saturday

Timberview Trail Run

Trail Run 5 km 5 mi 10 mi
July 2026
Jul
4
Saturday

Palmer Lake 4M

4 mi
Jul
10-11
Fr - Sa

Silverheels Trail Runs

Trail Run 10 mi 19 mi ... 100 km 100 mi
Jul
19
Sunday

Barr Trail Mountain Race

Trail Run 13 mi
Jul
19-21
Su - Tu

Transrockies Run

Trail Run
Jul
25
Saturday

Pikes Peak Ultra

Trail Run 20 km 30 km 50 km 50 mi
Jul
27
Monday

The Summit 200

Trail Run 200 mi
Jul - Aug
31-1
Fr - Sa

Rocky Mountain Half Marathon

5 km 21 km
August 2026
Aug
1
Saturday

Sheep Mountain Ultras

Trail Run 21 km 50 km 50 mi
Aug
8
Saturday

Run The Rockies Trail Race

Trail Run 5 km 10 km 21 km
Aug
15
Saturday

Mt. Sneffels Marathon

10 km 21 km
Aug
16
Sunday

Erie Half

5 km 21 km
Aug
29
Saturday

Thirsty 13 Half Marathon

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