Running Race Calendar in Colorado, United States

UACWMA Invasive Challenge 5K

Canon City, Colorado, United States

25 May, 2026 (Mon) – 04 Jul, 2026

$35.00

Running

5K

Smiles for Miles Memorial Day Fun Run - Sponsored by Dignity Memorial - Supporting Operation School Bell

Pueblo, Colorado, United States

25 May, 2026 (Mon)

Running

5K

The Narrow Gauge Races

Durango, Colorado, United States

24 May, 2026 (Sun)

Running

16.1K 5K 1.6K

2026 CKF Cape Town Marathon

Aspen, Colorado, United States

24 May, 2026 (Sun)

Running

Marathon

Memorial Day 5K Virtual Run - Pueblo

Pueblo, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K

Run for Mental Health 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

23 May, 2026 (Sat) – 14 Nov, 2026

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +14

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

Centennial, Colorado, United States

23 May, 2026 (Sat)

Running

5K 10K Half-Marathon 1.6K +2

Mile High Mile

Boulder, Colorado, United States

23 May, 2026 (Sat)

Running, Wheelchair

3.2K 1.6K +3

Memorial Day 5K Virtual Run - Denver

Denver, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K

Memorial Day 5K Virtual Run - Arvada

Arvada, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K

Memorial Day 5K Virtual Run - Colorado Springs

Colorado Springs, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K

Memorial Day 5K Virtual Run - Fort Collins

Fort Collins, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K