Found 241 races

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SEP
13

Denver, CO
• 13.6 miles
$20 -$51
The 9/11 Heroes Run 5K welcomes runners, ruckers, and walkers of all ages and fitness levels to honor the heroes of 9/11 and those who've served our nations since. We activate & unite communities...
5K
26
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13

Palmer Lake, CO
• 17.0 miles
$35
Join us on Sunday, September 14, 2025, at Palmer Lake Regional Recreation Area for the 7th Annual Colorado Run for the Fallen—an up to 6-hour untimed run/walk/ruck hosted by the Honor and...
5
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13

Thornton, CO
• 2.9 miles
$10 -$15
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area.  We provide a low-key, low-cost racing environment. Everyone is welcome to run with us! The 10km race uses a handicap...
5K 10K
54
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19

Colorado Springs, CO
• 33.9 miles
$25
All Hands on Deck Pirates 5K in Colorado Springs. Register now for this exciting running event.
5K
70
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19

Westminster, CO
• 7.2 miles
$25 -$85
One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with...
5K 10K Half Marathon
305
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19

Buena Vista, CO
• 19.9 miles
$30 -$100
Annual run in Buena Vista with supportive community atmosphere and race day excitement
5K 10K Half Marathon
264
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19

Beulah, CO
• 89.4 miles
$20 -$205
RACE START TIMES: 1/2 Marathon - 8:00 a.m.10K - 9:00 a.m.5K - 9:15 a.m. The Beulah Challenge, which started in 1996, is a 5K, 10K, and half-marathon run near Beulah, a small southern Colorado...
5K 10K Half Marathon
13
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19

Denver, CO
• 10.8 miles
$25 -$40
Come join us for a fantastic day to celebrate inclusion and community! We welcome all levels of participants and we welcome all people- this is a no sorry zone.  This event is our largest...
5K
14
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19

Brighton, CO
• 3.9 miles
$30
9th Annual GUMMBALL 5K - In Honor of Fallen Deputy Heath Gumm The Gummball 5K will be run in honor of our fallen brother, Deputy Heath Gumm. He paid the ultimate sacrifice on January 24, 2018. ...
5K
1
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19

Littleton, CO
• 21.2 miles
$25 -$35
Miles 4 Madison is a 5K/1K Fun Run supported by Sterling Ranch CAB. Miles 4 Madison's goal is to provide educational and recreational opportunities for families with children with different...
1K 5K
15
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19

Manitou Springs, CO
• 12.1 miles
$200 -$225
13.32 miles and 7,867ft of elevation gain.   From Manitou Springs to the summit of Pikes Peak. This is not your average half marathon, it is a challenge unlike any other!  
35
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20

Pueblo, CO
• 39.1 miles
$35 -$50
Southern Colorado Runners welcomes you to the revived Chile & Frijole Hot to Trot Race Sunday, September 20, 2026 @ 8AM. The Chile & Frijole Hot to Trot Race will be held on the last day of the...
5K 10K
10
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20

Pueblo, CO
• 39.1 miles
$35 -$50
Southern Colorado Runners welcomes you to the revived Chile & Frijole Hot to Trot Race Sunday, September 20, 2026 @ 8AM. The Chile & Frijole Hot to Trot Race will be held on the last day of the...
5K 10K
10
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20

Wheat Ridge, CO
• 13.5 miles
$10 -$30
The Farmers 5000 is likely one of the very first school-based 5K fundraisers in the state of Colorado. Since 1981, serious racers and weekend warriors alike have been coming to Wheat Ridge High...
5K
39
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20

Manitou Springs, CO
• 12.1 miles
$225 -$250
The 71st Annual Pikes Peak Marathon 26.2 miles with 7,834ft of elevation gain (and loss).From Manitou Springs to the summit of Pikes Peak and then back again.This is not your average marathon, it...
Marathon
64
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23

Winter Park, CO
• 43.3 miles
$150 -$400
CG Adventure Trip – Mountain ExperienceThis event is a guided CG adventure weekend designed to combine structured training, accountability, community, and an elevated mountain experience....
14
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26

Center, CO
• 106.9 miles
$25
Run in Center, CO with t-shirt
76
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26

Littleton, CO
• 25.6 miles
$40 -$65
Put on your lederhosen and sneakers as we kick off the annual HRCA Oktoberfest 5K in Town Center on Saturday, September 26, starting at 9:00 a.m.! Celebrate fall with a family-friendly,...
5K
21
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26

Commerce City, CO
• 8.1 miles
$35 -$65
The Night Nation Run is the World’s first Running Music Festival the ultimate blend of a Music Festival and a Fun Run. Experience a music filled course with Live DJs, Bubble Zones, Light Shows,...
27
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26

Colorado Springs, CO
• 8.5 miles
$90 -$120
What Is OUTLAST? OUTLAST is a 6-hour trail endurance challenge where runners complete a 5K every hour, on the hour. Each lap must be finished within the hour to stay in the event. If you finish...
3