Race Calendar in Colorado, United States

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

Centennial, Colorado, United States

23 May, 2026 (Sat) – 14 Nov, 2026

$30.00 - $50.00

Running

5K 10K Half-Marathon 1.6K +14

Farish Trail Race

Woodland Park, Colorado, United States

23 May, 2026 (Sat)

Free - $75.00

Trail running

Half-Marathon 10K 5K 1.6K

2026 CKF Cape Town Marathon

Aspen, Colorado, United States

24 May, 2026 (Sun)

Running

Marathon

The Narrow Gauge Races

Durango, Colorado, United States

24 May, 2026 (Sun)

Free - $85.00

Running

16.1K 5K 1.6K

Smiles For Miles Memorial Day Fun Run

Pueblo, Colorado, United States

25 May, 2026 (Mon)

Free

Running

5K

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)

Free

Running

5K

Youth TNT Program

Fort Collins, Colorado, United States

26 May, 2026 (Tue) – 04 Aug, 2026

Session Series #1 - Virginia Canyon

Idaho Springs, Colorado, United States

27 May, 2026 (Wed)

May 28 - InterVanced & Advanced @ Cheyenne Canyon

Colorado Springs, Colorado, United States

28 May, 2026 (Thu)

May 28 - Beginner / Intermediate @ Red Rock

Colorado Springs, Colorado, United States

28 May, 2026 (Thu)

Weld Your Mettle Running Festival

Eaton, Colorado, United States

30 May, 2026 (Sat) – 31 May, 2026

$55.00 - $230.00

Trail running, Running

Ultra 6.9K 22.5K Marathon +7