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Colorado Running calendar 2024-2025

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Explore the best running races in Colorado for 2024-2025! Our updated list features 197 exciting races across the state. Find your next race in Colorado below and join the running community at these great events!

August 2025
Aug - Sep
28-1
Th - Mo

Front Range Ultra Dayze

Trail Run
Aug
30
Saturday

Creede Mountain Run

Trail Run 2 mi 12 mi 22 mi 50 km
Aug
30
Saturday

Grand Traverse Mountain Run

Trail Run 40 mi
September 2025
Sep
1
Monday

Labor Day Half Marathon

5 km 10 km 21 km
Sep
6
Saturday

Cirque Series - Arapahoe Basin

Trail Run 9 mi
Sep
12-13
Fr - Sa

Run Rabbit Run

Trail Run 50 mi 100 mi
Sep
13
Saturday

Spooky Sprint - Colorado Springs

5 km 10 km 13 mi
Sep
13
Saturday

Snow Mountain Ranch

Trail Run 5 km 10 km ... 33 km 50 km
Sep
13
Saturday

The Denver 5k

5 km
Sep
13
Saturday

All-Out Fall Fest

5 km 10 km 13 mi
Sep
14
Sunday

Nun Run

5 km 13 mi
Sep
14
Sunday

Spooky Sprint - Denver

5 km 10 km 13 mi
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
20
Saturday

Miles 4 Madison 5K

5 km
Sep
27
Saturday

Golden Leaf Half Marathon

Trail Run 13 mi
Sep
27-28
Sa - Su

Sangre de Cristo Ultras

Trail Run 8 mi 27 km ... 100 km 100 mi
Sep
27-28
Sa - Su

The Bear Chase

Trail Run 5 km 10 km ... 50 mi 100 km
Sep
27-28
Sa - Su

Tough Mudder - Colorado

Obstacle Run 5 km 15 km
Sep
27
Saturday

Tough Mudder - Toughest Mudder Colorado

Obstacle Run 5 mi