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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 200 exciting races across the state. Find your next race in Colorado below and join the running community at these great events!

July 2025
Jul
27
Sunday

Spirit of the West 5K

5 km
Jul
28
Monday

The Summit 200

Trail Run 200 mi
August 2025
Aug
1-2
Fr - Sa

Rocky Mountain Half Marathon

5 km 13 mi
Aug
2
Saturday

Sheep Mountain Ultras

Trail Run 21 km 50 km 80 km
Aug
2
Saturday

Boulder Rez Marathon

Trail Run 10 km 21 km 31 km 42 km
Aug
2
Saturday

All-Out Runapalooza

5 km 10 km 21 km
Aug
4-9
Mo - Sa

Transrockies Run

Trail Run 120 mi
Aug
6-27
We - We

Lory Summer Trail Series

Trail Run 5 km 10 km 12 km
Aug
8
Friday

High Five 100 - Lake City, CO

Trail Run 100 mi
Aug
8-9
Fr - Sa

Choice City Running Festival

5 km 10 km 21 km
Aug
9
Saturday

Dog Days of Summer

3 mi
Aug
9
Saturday

Holy Cow Trail Stampede

Trail Run 5 km
Aug
15
Friday

San Juan Softie 100

Trail Run 100 mi
Aug
16-17
Sa - Su

Leadville Trail 100 Mile Run

Trail Run 100 mi
Aug
16
Saturday

Mt. Sneffels Marathon

10 km 13 mi 26 mi
Aug
17
Sunday

Erie Half

5 km 13 mi
Aug
23
Saturday

Thirsty 13 Half Marathon

13 mi
Aug
23
Saturday

Telluride Mountain Run

Trail Run 13 mi 24 mi 40 mi
Aug
23
Saturday

Westminster Night Trail

Trail Run 5 km 10 km ... 35 km 50 km
Aug
23
Saturday

Boulder Sunset Run

5 km 10 km