Found 226 races

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SEP
19

Colorado Springs, CO
• 109.3 miles
$25
All Hands on Deck Pirates 5K in Colorado Springs. Register now for this exciting running event.
5K
73
SEP
19

Westminster, CO
• 72.0 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
SEP
19

Buena Vista, CO
• 78.6 miles
$30 -$100
Annual run in Buena Vista with supportive community atmosphere and race day excitement
5K 10K Half Marathon
268
SEP
19

Denver, CO
• 73.5 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
17
SEP
19

Brighton, CO
• 61.0 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
2
SEP
19

Red Feather Lakes, CO
• 100.6 miles
$35
The Tavern at Red Feather Lakes is planning this year's Oktoberfest on Saturday, September 19th. As a part of the festivities, Caring Hearts of Red Feather Lakes Foundation is putting on our...
13
SEP
19

Littleton, CO
• 78.2 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
16
SEP
19

Manitou Springs, CO
• 113.5 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!  
41
SEP
19

Wellington, CO
• 69.9 miles
$15 -$65
Wellington STAR Foundation 5K & 10K @ Centennial ParkEnjoy warm late-summer sunshine as you run through the welcoming streets of Wellington, Colorado. With wide-open views, small-town charm, and...
5K 10K
21
SEP
20

Cheyenne, WY
• 75.7 miles
$30
Grab your leash, lace up your running shoes, and join us May 16, 2026, for the Dog Jog 5K, a tail-wagging, dog-friendly race to support the Cheyenne Animal Shelter! Whether you’re a seasoned...
5K
59
SEP
20

Wheat Ridge, CO
• 76.8 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
46
SEP
20

Manitou Springs, CO
• 113.5 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
66
SEP
26

Estes Park, CO
• 89.4 miles
$90 -$265
​Join us for the Estes Epic on September 26-27, 2026 —a premier event featuring a 50k Bike Race, 50k Run, and Heavy Half Marathon. After a six-year hiatus, this challenging race returns, offering...
Half Marathon 50K
39
SEP
26

Littleton, CO
• 80.2 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
26
SEP
26

Commerce City, CO
• 65.5 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,...
31
SEP
26

Colorado Springs, CO
• 114.0 miles
$100 -$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...
4
SEP
26

Broomfield, CO
• 73.7 miles
$25 -$40
RUNWAY 5K: In-Person (Broomfield, CO) and Virtual (Anywhere)! A Benefit Run/Walk for Angel Flight West Join Us to Run for a Cause That Matters! Funds raised will support Angel Flight West and...
5K
15
SEP
27

Larkspur, CO
• 91.5 miles
$60
WELCOME Welcome to the 4th annual Greenland Open Space Pack Burro Race presented by Double Rainbow Ranch! Grab your burro and join us for a fun and rewarding day on the majestic Greenland Open...
3m 8m
SEP
27

Timnath, CO
• 63.6 miles
$15 -$40
Join us for the Race for Joy & Justice 5K, a family-friendly run/walk event benefiting the Joy & Justice organization based in Timnath, Colorado. This exciting event brings together people of all...
1m 5K
28
SEP
27

Boulder, CO
• 79.5 miles
$40 -$500
This is a virtual race open to supporters across the country who want to take action for children and families. Participants can run, walk, or move in their own community while supporting a...
5K 10K Half Marathon
17