Race Calendar in Colorado, United States

Aug

15

2026 CKF Leadville Trail 100 MTB

Leadville, Colorado, United States

Mountain biking

Ultra

Aug

15

Sunrise Stampede

Longmont, Colorado, United States

Running

5K 1.6K +1

Aug

15

ThunderRidge Grizzly 2 Mile

Highlands Ranch, Colorado, United States

Running

3.2K 1.6K

Aug

15

Cookie Run 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +8

Aug

15

Cwcs 5K Color Fun Run

Montrose, Colorado, United States

Running

5K

Aug

15

Frontier Academy Community 5K

Greeley, Colorado, United States

Running

5K

Aug

15

Moco Trails Wild West Backyard Ultra

Craig, Colorado, United States

Trail running Running

6.7K

Aug

15

Farish Mt Bike Race

Woodland Park, Colorado, United States

Mountain biking

9.7K 19.3K 25.7K

Aug

15

Miles for Migraine Colorado

Denver, Colorado, United States

Running

3.2K 5K

Aug

15

Run for PB& J 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Aug

14

Valor Under The Lights 3200M

Highlands Ranch, Colorado, United States

Running

3.2K

Aug

13

Usa Virtual Mile - Lakewood

Lakewood, Colorado, United States

Running

1.6K