Colorado Obstacle Race Calendar 2025-2026

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Explore the best obstacle runs in Colorado for 2025-2026! Our updated list features 356 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

April 2025
Apr
12
Saturday

Boulder Rez Half

5 km 10 km 13 mi
Apr
12
Saturday

RMRR Spring Marathon Training Series

10 mi 20 mi
Apr
12
Saturday

Run Through The Decades Half - Colorado Springs

6 km 7 km 8 km 13 mi
Apr
13
Sunday

Spring Fling Prairie Dog Half Marathon

5 km 10 km 13 mi
Apr
13
Sunday

Three Creeks Half Marathon

13 mi
Apr
13
Sunday

Platte River Half-Marathon

13 mi
Apr
13
Sunday

Horsetooth Half Marathon

13 mi
Apr
13
Sunday

Dash for Detection: Oral Cancer Awareness 5K

5 km
Apr
19
Saturday

Rattler Trail Race

Trail Run 10 km 25 km 50 km
Apr
19
Saturday

All-Out Beat the Heat

5 km 10 km 13 mi
Apr
19
Saturday

Rock Hawk

Trail Run 5 km 10 km 25 km 50 km
Apr
19
Saturday

Great Western Trail Race

Trail Run 5 km 10 km 13 mi
Apr
19
Saturday

Most Eggcellent 10K

5 km 10 km
Apr
19
Saturday

Can't Be Mad Running Festival

Trail Run 5 km 10 km 3 hr
Apr
19
Saturday

Woody's Tortoise and Hare

5 km
Apr
19
Saturday

The Best Races - Aurora

5 km 10 km 13 mi
Apr
19
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Apr
20
Sunday

The Mile High 4.20K Run

4 km
Apr
26
Saturday

Bigfoot Half Marathon

5 km 13 mi
Apr
26
Saturday

Runs With Scissors Races

13 mi 26 mi 50 km
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