Found 300 races

🎉 Join Your Local Running Community!

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

JUL
25

Salida, CO
• 79.9 miles
$25 -$40
The National High School Trail Championship (NHSTC) is a 5.4 mile trail race for high school athletes and includes 2026 high school graduates and incoming freshmen. The fourth running of the...
4
JUL
25

Pueblo, CO
• 78.1 miles
$50
Want to start running but don’t know where to start? Want to get back into running and need a plan? The Southern Colorado Runners are hosting an 8-week training clinic designed to help you...
5K
10
JUL
25

Pine, CO
• 89.5 miles
DescriptionCome run with us in amazing Staunton State Park!This race day will offer a 10 mile distance.Play fun games from our rec trailer, visit our sponsors and vendor tents while you wait for...
10m
14
JUL
25

Pine, CO
• 89.5 miles
DescriptionCome run with us in amazing Staunton State Park!This race day will offer a 5k distance.Play fun games from our rec trailer, visit our sponsors and vendor tents while you wait for your...
5K
11
JUL
25

Aurora, CO
• 60.8 miles
$10 -$45
The 7/20 Foundation is proud to present the 5th annual Hero’s Journey 5k Run/Walk. This race makes its way through Aurora's City Center and the High Line canal trail with a start and finish in...
5K
17
JUL
26

Golden, CO
• 70.1 miles
$30 -$40
Spirit of the West 5K Run/Walk in Golden, CO - community 5K race featuring great community spirit and atmosphere
5K
135
AUG
1

Aurora, CO
• 59.2 miles
$12 -$47
Join Us for the 12th Annual Run for the Ring 5K & Kids Fun Run! Over the past 12 years, the Run for the Ring 5K & Kids Fun Run has brought together Barbara Davis Center patients, loyal type 1...
5K
11
AUG
1

Denver, CO
• 59.2 miles
Whether you’re a seasoned runner or just love to walk and take in the scenery, SKECHERS Wicked Wine Run is for you! Each course will be held on beautiful properties or various partner vineyards...
1K 5K
18
AUG
1

Colorado Springs, CO
• 32.3 miles
$35 -$65
Beat the heat and treat yourself at the Popsicle 5K/10K/Half Marathon—a sweet celebration of summer miles and frozen rewards. Whether you’re racing the speedy 5K, cruising through the 10K, or...
5K 10K Half Marathon
36
AUG
1

Colorado Springs, CO
• 32.3 miles
$40 -$65
Beat the heat and treat yourself at the Popsicle 5K/10K/Half Marathon—a sweet celebration of summer miles and frozen rewards. Whether you’re racing the speedy 5K, cruising through the 10K, or...
5K 10K Half Marathon
9
AUG
1

Parker, CO
• 69.9 miles
$25
RunAbilities FUN Walk/Run/Roll Join Parker Recreation and Square Peg Therapies for our annual RunAbilities FUN Walk/Run/Roll! Now in its fourth year, RunAbilities FUN Walk/Run/Roll is a...
2m
2
AUG
1

Fairplay, CO
• 125.8 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
• 29.4 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
• 73.7 miles
$17 -$56
5K road featuring competitive racing and community celebration
5K
47
AUG
2

Denver, CO
• 57.1 miles
$45 -$115
Have you been dreaming of running the Boston Marathon? Need to shave a few minutes off your qualifying time? Or maybe you're just looking for the perfect course to set a new PR? Whether Boston is...
Half Marathon Marathon
53
AUG
4

Fort Collins, CO
• 46.2 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their...
5K
21
AUG
6

Boulder, CO
• 59.8 miles
$20
NO Race Day Registrations Fun for all, from newcomers of any age racing for the first time to veteran competitors looking to test their fitness, all in a friendly, welcoming environment. Held at...
1m
9
AUG
6

Eldorado Springs, CO
• 64.7 miles
$30
Founded in 1979, the Eldorado Run for the Cure is the longest operating charitable footrace in the State of Colorado. All proceeds from the annual four-mile run benefit the Colorado Cancer...
12
AUG
7

Fort Collins, CO
• 40.7 miles
$26 -$110
Friday, August 7th, 2026 Jane Welzel Mountain Ave Mile Faster than Flat - point-to-point, slightly downhill mile on Mountain Avenue in Fort Collins, CO. Featuring multiple race waves:  Mountain...
5K 10K Half Marathon
14
AUG
7

Centennial, CO
• 70.8 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