Race Calendar in Colorado, United States

May

24

2026 CKF Cape Town Marathon

Aspen, Colorado, United States

Running

Marathon

May

24

The Narrow Gauge Races

Durango, Colorado, United States

Running

16.1K 5K 1.6K

May

23

Memorial Day 5K Virtual Run - Colorado Springs

Colorado Springs, Colorado, United States

Running

5K

May

23

Memorial Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

May

23

Memorial Day 5K Virtual Run - Arvada

Arvada, Colorado, United States

Running

5K

May

23

Memorial Day 5K Virtual Run - Denver

Denver, Colorado, United States

Running

5K

May

23

GMR Backyard Ultra

Golden, Colorado, United States

Running

GMR Backyard Ultra

May

23

Memorial Day 5K Virtual Run - Pueblo

Pueblo, Colorado, United States

Running

5K

May

23

Memorial Day 5K Virtual Run - Fort Collins

Fort Collins, Colorado, United States

Running

5K

May

23

Memorial Day 5K Virtual Run - Thornton

Thornton, Colorado, United States

Running

5K

May

23

Memorial Day 5K Virtual Run - Lakewood

Lakewood, Colorado, United States

Running

5K

May

23

Run for Mental Health 5K/10K/13.1 Denver/Aurora

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +14