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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!

September 2025
Sep
27
Saturday

Crested Butte Ultra

Trail Run 35 km 55 km 50 mi
Sep
27
Saturday

24 Hours Of Palmer Lake

Trail Run 24 hr
Sep
27
Saturday

Pioneer Prairie Dog Half

5 km 10 km 13 mi
Sep
28
Sunday

Run Boulderthon: The Boulder Marathon

5 km 10 km 13 mi 26 mi
October 2025
Oct
4
Saturday

Colorado Springs Marathon

5 km 13 mi 26 mi
Oct
4
Saturday

Rim to Rim Royal Gorge Races

Trail Run 5 km 8 mi 13 mi
Oct
4
Saturday

Rocky's Backyard Ultra

Backyard Ultra 4 mi
Oct
4
Saturday

West Elk Challenge

Trail Run 26 mi
Oct
4
Saturday

Not So Flatt Breast Cancer Awareness Run

5 km 10 km
Oct
11
Saturday

Manitou 5K

5 km
Oct
11
Saturday

Breckenridge Road Marathon

10 km 13 mi 26 mi
Oct
12
Sunday

Westy Half

5 km 13 mi
Oct
18
Saturday

Indian Creek Trail Runs

Trail Run 5 mi 15 mi 55 km 50 mi
Oct
18
Saturday

The Great Trailhead Foot Race 10 Miler

Trail Run 5 km 10 mi
Oct
26
Sunday

Ghosts and Goblins 10K

5 km 10 km
November 2025
Nov
1
Saturday

Turkey Trails

5 km 10 km
Nov
1
Saturday

City Park 5k for Pancreatic Cancer Research

5 km
Nov
2
Sunday

All-Out Kooky-Spooky

5 km 10 km 21 km
Nov
15
Saturday

Louisville Trail Race

Trail Run 5 km 10 km 13 mi