Found 212 races

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Connect with runners, find training partners, and celebrate every finish together

AUG
1

Fairplay, CO
• 58.6 miles
$100 -$180
The Human Potential Running Series Presents: The Sheep Mountain Trail Runs @ Fairplay, CO Come ready my friends, this...
Half Marathon 50K
86
AUG
1

Colorado Springs, CO
• 50.5 miles
$25
Join us at Mount Saint Francis of Assisi on August 1st for a morning of community and purpose! Whether you prefer a scenic 1-mile stroll or want to tackle our brand-new 5K challenge, every step...
1m 5K
5
AUG
1

Highlands Ranch, CO
• 79.3 miles
$17 -$56
5K road featuring competitive racing and community celebration
5K
47
AUG
7

Centennial, CO
• 82.6 miles
$10 -$15
August may be hot...but still a great time to run, and we hope you'll come join the runners of RMRR. We'll run our August 5k on the Highline Canal around DeKoevend Park.  As always, everyone is...
5K
76
AUG
8

Arvada, CO
• 94.4 miles
$40 -$353
12th annual end-of-summer celebration on Ralston Creek Trail with Half Marathon, 10K, and 5K distances. Official BOLDERBoulder qualifier supporting veterans.
5K 10K Half Marathon
193
AUG
8

Centennial, CO
• 81.0 miles
$27 -$40
Run. Support. Celebrate.Join us for the 7th Annual Arapahoe Warrior 5K and support the Arapahoe Warrior Cross Country Team! With $10 from every registration going directly to the Arapahoe Cross...
5K
61
AUG
8

Colorado Springs, CO
• 50.6 miles
$65 -$90
Join us and "Race for the horseshoe!" Starting August 8, 2026 we will be bringing back the historic Pony Express race. Now with a new annual race weekend, the second Saturday of August, we honor...
8m 16m
4
AUG
8

Woodland Park, CO
• 42.9 miles
$65 -$90
Join us and "Race for the horseshoe!" Starting August 8, 2026 we will be bringing back the historic Pony Express race. Now with a new annual race weekend, the second Saturday of August, we honor...
8m 16m
3
AUG
8

Thornton, CO
• 99.7 miles
$17 -$48
Join us for the annual Summer Sizzler 5k/10k/15k!  A fun summer event that is perfect for the whole family. The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live...
1m 5K 10K 15K
286
AUG
9

Leadville, CO
• 69.0 miles
$65 -$80
Leadville Boom Days International Pack Burro RaceHauling Ass for Over 70 Years Step back into the grit and glory of the Old West at the legendary Leadville Boom Days International Pack Burro...
12
AUG
9

Littleton, CO
• 81.6 miles
$20 -$25
Work up an appetite for a deluxe breakfast at the Pancake Stampede 5K! The race is a part of Littleton's Western Welcome Week celebration, and is held before the annual pancake breakfast at...
5K
4
AUG
9

Lakewood, CO
• 87.0 miles
$25 -$50
                                               Run the Race. Stay for the Party. 
5K
3
AUG
15

Centennial, CO
• 86.6 miles
$30 -$45
🥯🏃‍♂️ Run for the carbs. Stay for the bagels.Love running? Love bagels? This one’s for you.Whether you’re chasing a workout or just here for the carbs, this run is all about balance, fun, and...
1m 5K 10K Half Marathon
27
AUG
15

Denver, CO
• 91.8 miles
Miles for Migraine will host its 6th annual 2-mile Walk, 5K Run and Relax Denver Event at Great Lawn Park. This event is a fundraiser for Migraine & Headache Awareness, Treatment & Research....
2m 5K
19
AUG
15

Colorado Springs, CO
• 35.6 miles
$45 -$115
The Cheyenne Mountain Run features three scenic trail races inside Cheyenne Mountain State Park: 25K Mountain Challenge – for advanced trail runners10K Trail Race – for experienced runners5K...
5K 10K 25K
130
AUG
16

Denver, CO
• 88.8 miles
$40 -$55
The 30th Annual Cancer League of Colorado Race 4 Research 5K Run/Walk is excited to be back to the full event you love Sunday, August 16, 2026, at Washington Park, Denver! Run In-Person The race...
5K
AUG
16

USAF Academy, CO
• 48.9 miles
$20 -$24
Looking to run the fastest mile of your life? Dropping over 220 feet from start to finish, the Flying Falcon Downhill Mile is designed to help you chase a massive personal best while experiencing...
2
AUG
22

Centennial, CO
• 82.2 miles
$39
Our annual 5K/10K Run or Walk to Support Susie's Higher-Ed Fund   We'll be returning to Family Worship Center for the start and finish of this year's 5K/10K.  Our event will take place on August...
5K 10K
12
AUG
22

Evergreen, CO
• 83.6 miles
DescriptionCome run with us in beautiful Evergreen to the top of Bergen Peak at gorgeous Elk Meadow Park!This race day will offer a 5k distance race through the lower sections of Elk Meadow...
5K
10
AUG
22

Evergreen, CO
• 83.6 miles
DescriptionCome run with us in beautiful Evergreen to the top of Bergen Peak at gorgeous Elk Meadow Park!This race day will offer a Half Marathon distance. The Half Marathon will take you to the...
Half Marathon Marathon
23