Found 177 races

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SEP
7

Parker, CO
• 18.7 miles
$33 -$85
Celebrate the last blast of summer at the Labor Day Half Marathon
5K 10K Half Marathon
81
SEP
10

Greeley, CO
• 46.2 miles
$15 -$45
✨🦸 Welcome to the 14th Annual Superhero Run! 🦸✨ This isn’t just a race - it’s a chance to make an impact by stepping up for others. On Saturday, September 19, 2026, we’ll be back at Greeley’s...
1m 5K 10K
16
SEP
12

Littleton, CO
• 13.6 miles
$40 -$50
The National Federation of the Blind of Colorado 6 Dot Dash presented by Waymo is an annual 5k event to raise awareness and funds for the National Federation of the Blind of Colorado/Colorado...
5K
13
SEP
12

Greeley, CO
• 45.1 miles
$35 -$45
Join us for the For the City Network 5K, a community run/walk dedicated to strengthening neighborhoods, supporting families, and creating positive change across Weld County. This event is open to...
5K
22
SEP
12

Loveland, CO
• 45.3 miles
$5 -$15
Come join us for a 1-mile fun run, as we kick off the Wild Wonderful Saturday events. Plan to stay and check out the Wild Zone. Welcome adventurers, explorers, and vine-swinging daredevils! You...
8
SEP
12

Monument, CO
• 45.4 miles
$30 -$75
Run4Hope 5K for Schools is an in-person competitive 5k, 2-mile Family Color Run (or walk), followed by a huge Community Block Party and free BBQ to celebrate HOPE in El Paso County! This event is...
5K
5
SEP
12

Denver, CO
• 7.1 miles
$44 -$60
The Denver 5k in Denver, CO - family-friendly community race featuring great community spirit and atmosphere
5K
578
SEP
13

Denver, CO
• 8.1 miles
$20 -$30
31st El Grito 5k run/walk - Sunday, September 13, 2026 at 9am Start & finish hosted by MSU Denver (900 Auraria Parkway, Denver, CO 80204) In 1994, a group of friends with a love for running,...
5K
1
SEP
13

Denver, CO
• 3.3 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
27
SEP
13

Palmer Lake, CO
• 44.2 miles
$35
A commemorative tribute honoring Colorado's fallen service members with a 1 mile walk and 5K run, ruck, or walk.
6
SEP
13

Denver, CO
• 8.8 miles
$15 -$50
Who We Are: Healthy Kids Running Series is a five (5) week running program in the spring and fall for kids Pre-K through 8th grade. Each HKRS Series takes place once a week and offers...
0m 1m 2m 4m
5
SEP
13

Loveland, CO
• 44.7 miles
$15 -$30
Are you ready to challenge yourself? We will have a 1-mile loop open for 1 ½ hrs. Who can run the most loops in 1 ½ hrs? Who can run the fastest? We will have awards for different categories....
29
SEP
13

Thornton, CO
• 8.6 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
65
SEP
19

Westminster, CO
• 14.2 miles
$35 -$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
307
SEP
19

Buena Vista, CO
• 30.2 miles
$30 -$100
Annual run in Buena Vista with supportive community atmosphere and race day excitement
5K 10K Half Marathon
271
SEP
19

Denver, CO
• 10.2 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
18
SEP
19

Brighton, CO
• 11.5 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
3
SEP
19

Littleton, CO
• 13.5 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
17
SEP
20

Aurora, CO
• 2.1 miles
$24 -$40
Youth and adult XC races from 1k to 5km. The courses are almost all grass, flattish, sometimes uneven, with small undulations, a small creek crossing, and bale jumps. The 3k & 5k races will start...
2K 3K 4K 5K
3
SEP
20

Wheat Ridge, CO
• 13.2 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
48