Colorado Running calendar 2025-2026

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Explore the best running races in Colorado for 2025-2026! Our updated list features 301 exciting races across the state. Find your next race in Colorado below and join the running community at these great events!

October 2025
Oct
11
Saturday

The Long View Marathon

5 km 13 mi 26 mi
Oct
11
Saturday

Breckenridge Road Marathon

10 km 13 mi 26 mi
Oct
11
Saturday

Sage Burner Trail Run

Trail Run 50 km
Oct
12
Sunday

The bRUNch Run

5 km 10 km
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
18-19
Sa - Su

Blue Sky Trail Marathon

Trail Run 13 mi 26 mi
Oct
18
Saturday

The Great Trailhead Foot Race 10 Miler

Trail Run 5 mi 10 mi
Oct
18
Saturday

Bobcat Trail Race

Trail Run 5 km 10 km 25 km 50 km
Oct
25
Saturday

Foundry Halloween 5k

5 km
Oct
26
Sunday

Ghosts and Goblins 10K

5 km 10 km
November 2025
Nov
1
Saturday

City Park 5k for Pancreatic Cancer Research

5 km
Nov
1-2
Sa - Su

Colorado 24 Hour Run

Backyard Ultra 6 hr 12 hr 24 hr
Nov
1
Saturday

Turkey Trails

5 km 10 km
Nov
2
Sunday

Turkey Trails Denver

5 km 10 km
Nov
2
Sunday

RMRR Trophy Series

5 km 15 km
Nov
2
Sunday

All-Out Kooky-Spooky

5 km 10 km 13 mi
Nov
2
Sunday

Rim Rock Marathon & Half Marathon

13 mi 26 mi
Nov
8
Saturday

Kessel Run Ultra

Trail Run 10 mi 20 mi ... 40 mi 50 mi
Nov
8
Saturday

Bingo! Trail Party

Trail Run 10 mi 20 mi 42 mi 54 mi
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