Race Calendar in Colorado, United States

May

23

GMR Backyard Ultra

Golden, Colorado, United States

Running

GMR Backyard Ultra

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

May

22

8th Annual Angel Run at Red Leg Brewing

Colorado Springs, Colorado, United States

Running

5K 10K +2

May

21

Thursday May 21 - Ride Guides Only Practice Guide @ Palmer with Stacy

Colorado Springs, Colorado, United States

Cycling

Thursday May 21 - Ride Guides Only Practice Guide @ Palmer with Stacy

May

20

AdventHealth Race to Rebuild

Lone Tree, Colorado, United States

Running

1.6K

May

20

HRCA Highlands Point Circuit

Highlands Ranch, Colorado, United States

Cycling

Open Masters 50+ Sport Single Speed Open +5

May

19

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

Denver, Colorado, United States

Running

5K

May

19

May 19 - Pre-Season Purple Prep & Bike Fit at SRAM

Colorado Springs, Colorado, United States

Running

May 19 - Pre-Season Purple Prep & Bike Fit

May

18

WMBA Race Team Nutrition & Training Meeting

Colorado Springs, Colorado, United States

Running

WMBA Race Team Nutrition & Training Meeting

May

17

Healing Warriors Program 2026 Annual 5K Fun Run

Fort Collins, Colorado, United States

Running

5K

May

17

Girls on the Run Rockies Colfax SoleMates 2026

Denver, Colorado, United States

Running

Marathon Half-Marathon

May

17

Canine On the Creek

Dumont, Colorado, United States

Running

5K 1.6K