5K races in Colorado, United States — 2026 running calendar

Memorial Day 5K Virtual Run - Lakewood

Lakewood, 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

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

Denver, Colorado, United States

19 May, 2026 (Tue)

Running

5K

Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, Colorado, United States

17 May, 2026 (Sun)

Running

5K

Canine On the Creek

Dumont, Colorado, United States

17 May, 2026 (Sun)

Running

5K 1.6K

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

Denver, Colorado, United States

16 May, 2026 (Sat)

Running

5K

Growing Home - Colfax Fundraiser

Denver, Colorado, United States

16 May, 2026 (Sat) – 17 May, 2026

Running

5K

Spirit Challenge Run for Autism 10k and 5k

Steamboat Springs, Colorado, United States

16 May, 2026 (Sat)

Running

10K 5K

Gluten Free Gallop 5K

Littleton, Colorado, United States

16 May, 2026 (Sat)

Running

5K 2.5K

Know. Grow. GO RUN. 5K

Loveland, Colorado, United States

15 May, 2026 (Fri)

Running

5K

Denver Mother's Day 5K

Denver, Colorado, United States

10 May, 2026 (Sun)

Running

5K

Super Mom 5K/10K/Half - Colorado Springs

Colorado Springs, Colorado, United States

10 May, 2026 (Sun)

Running

5K 10K Half-Marathon +5