Running Race Calendar in Colorado, United States

Memorial Day 5K Virtual Run - Lakewood

Lakewood, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K

Memorial Day 5K Virtual Run - Thornton

Thornton, Colorado, United States

23 May, 2026 (Sat) – 25 May, 2026

Running

5K

8th Annual Angel Run at Red Leg Brewing

Colorado Springs, Colorado, United States

22 May, 2026 (Fri) – 25 May, 2026

Running

5K 10K +2

AdventHealth Race to Rebuild

Lone Tree, Colorado, United States

20 May, 2026 (Wed)

Running

1.6K

Richard B. "Dick" and Peggy 5K Fun Run/Walk

Denver, Colorado, United States

19 May, 2026 (Tue)

Running

5K

Canine On the Creek

Dumont, Colorado, United States

17 May, 2026 (Sun)

Running

5K 1.6K

Colfax Marathon

Lone Tree, Colorado, United States

17 May, 2026 (Sun)

Running

Marathon

Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, Colorado, United States

17 May, 2026 (Sun)

Running

5K

Girls on the Run Rockies Colfax SoleMates 2026

Denver, Colorado, United States

17 May, 2026 (Sun)

Running

Marathon Half-Marathon

Girls on the Run 5K at Colfax - Running Buddies and Volunteers

Denver, Colorado, United States

16 May, 2026 (Sat)

Running

5K

Gluten Free Gallop 5K

Littleton, Colorado, United States

16 May, 2026 (Sat)

Running

5K 2.5K

Spirit Challenge Run for Autism 10k and 5k

Steamboat Springs, Colorado, United States

16 May, 2026 (Sat)

Running

10K 5K