Running Race Calendar in Colorado, United States

Sep

21

Mountain Lions XC Program

Boulder, Colorado, United States

$120.00

Running

Mountain Lions XC Program

Sep

23

CG Adventure Club - Elevation Everest

Winter Park, Colorado, United States

Running

35.4K Ultra

Sep

25

Boggy Draw Bear Chase

Dolores, Colorado, United States

Running

3K 5K

Sep

25

NW Open Spaces 5k XC PR Challenge

Northglenn, Colorado, United States

Running

5K BOYS VARSITY GIRLS VARSITY

Sep

25

Skate for Chicken

Colorado Springs, Colorado, United States

$30.00

Running

2026 Skate for Chicken

Sep

26

Parker Parks and Recreation So Long to Summer 5K/10K

Parker, Colorado, United States

$40.00 - $50.00

Running

5K 10K

Sep

26

2026 Suicide Prevention Color Walk/Run

Center, Colorado, United States

$25.00

Running

5K

Sep

26

McGinn Memorial Cross Country Challenge

Pagosa Springs, Colorado, United States

Free

Running

3K 5K

Sep

26

Lisa Nelson’s Mustang Stampede 5K

Arvada, Colorado, United States

$30.00

Running

5K

Sep

26

Bayfield Heritage Days 5k

Bayfield, Colorado, United States

$20.00

Running

5K

Sep

26

Oktoberfest Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado, United States

$30.00 - $45.00

Running

5K 10K Half-Marathon 1.6K +2

Sep

26

NIGHT NATION RUN - DENVER

Commerce City, Colorado, United States

$35.00 - $55.00

Running

5K