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

Sep

27

14er Fest 14K & 5K

Buena Vista, Colorado, United States

Running

14K 5K

Sep

27

Running for Children's Rights to Both Parents - 9 of 50 Half Marathons in 50 States - Colorado

Boulder, Colorado, United States

Running

Half-Marathon 5K 10K

Sep

27

Pat Mahan Memorial Foundation 5K

Wiggins, Colorado, United States

Running

5K

Sep

27

Wwe Run With The Wolves

Arvada, Colorado, United States

Running

5K 1K

Sep

26

Bayfield Heritage Days 5k

Bayfield, Colorado, United States

Running

5K

Sep

26

25th Annual Black Canyon Triathlon

Montrose, Colorado, United States

Triathlon Running

Youth Individual Triathlon Entry Adult Individual Triathlon Entry 2-3 Person Youth Team Triathlon Entry 2-3 Person Adult Team Triathlon Entry +3

Sep

26

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

Centennial, Colorado, United States

Running

5K 10K Half-Marathon 1.6K +2

Sep

26

Mesa County Search & Rescue 5K

Fruita, Colorado, United States

Running

5K

Sep

26

McGinn Memorial Cross Country Challenge

Pagosa Springs, Colorado, United States

Running

3K 5K

Sep

26

Lisa Nelson’s Mustang Stampede 5K

Arvada, Colorado, United States

Running

5K

Sep

26

Run For Your Flapjacks 5K

Oak Creek, Colorado, United States

Running

5K

Sep

26

HRCA Oktoberfest 5K

Littleton, Colorado, United States

Running

5K