Found 226 races

🎉 Join Your Local Running Community!

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

AUG
15

Longmont, CO
• 68.6 miles
$10 -$40
The Sunrise Stampede 5K and 1-Mile Fun Run/Walk is a community celebration that brings together neighbors, schools, students, families, educators, local businesses, and supporters from across St....
1m 5K
5
AUG
16

Denver, CO
• 72.8 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
5
AUG
16

Erie, CO
• 67.0 miles
$45 -$85
5K road featuring competitive racing and community celebration
5K Half Marathon
136
AUG
16

USAF Academy, CO
• 103.6 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
18

Bellvue, CO
• 76.0 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
29
AUG
22

Centennial, CO
• 77.0 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
13
AUG
22

Evergreen, CO
• 91.6 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
• 91.6 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
AUG
22

Louisville, CO
• 73.7 miles
$30
The Coyote Chase 5k is a 5k race that supports the Monarch HS XC program. The race is on the Monarch HS campus and is a 2k loop that consists of grass, dirt and concrete. The grass portion of the...
5K
AUG
22

Westminster, CO
• 69.5 miles
$45 -$55
Now in its 28th year, the Jog in the Bog 5K is a fun opportunity to get active while supporting SLHS.    Registration includes a commemorative t-shirt, goodie bag, entry into prize drawing, and...
5K
2
AUG
22

Denver, CO
• 72.0 miles
$20 -$40
Run in Denver, CO with t-shirt
1m 5K
32
AUG
22

Pine, CO
• 98.8 miles
$110 -$130
Welcome to the Staunton Rocks! Marathon & Half, an event put on by trail runners for trail runners. Touring the renowned singletrack of Staunton State Park in Colorado’s Front Range Mountains...
Half Marathon Marathon
61
AUG
23

Westminster, CO
• 71.5 miles
$40 -$95
Welcome to the Pioneer Prairie Dog Half Marathon event; the one that started the series! With 10k and 5k events too!  Everyone is back to school and slipping into a routine.  Make this your...
5K 10K Half Marathon
300
AUG
23

Denver, CO
• 68.2 miles
$8 -$55
Be part of something bigger at Conservation Colorado’s second annual Rebel Run 5K — where movement meets momentum for our climate, air, land, water and communities. Last year, more than 230...
2m 5K
27
AUG
24

Evergreen, CO
• 92.1 miles
DescriptionInternet Registration has not begun yet. Check Registration Dates in details.Fall 2026 JeffCo League MS Cross CountryAug 24 - Oct 14RMAE practice- Mon/Wed 3:45-4:45pm @ RMAEJeffco...
4
AUG
25

Bellvue, CO
• 76.0 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. This fourth race of the series will take place on the fast and flat Valley Trail at Lory State Park. Our goal is to...
12K
25
AUG
27

Commerce City, CO
• 67.1 miles
DescriptionPut your problem-solving skills to the test in this exciting puzzlingcompetition! Participants will race against the clock to completea 300-piece jigsaw puzzle. Whether you’re a...
5
AUG
29

Littleton, CO
• 81.0 miles
$35 -$75
Glow & Roll is an inclusive, dusk-time 5K Walk/Run/Roll (with a 1.6-mile option) A glow-filled, twilight experience with lights, music and day-glow swag that transforms the event into a...
1m 5K
4
AUG
29

Elizabeth, CO
• 75.2 miles
$10 -$25
Elizabeth Main Street 5K Run/Walk & Family Color Run August 29, 2026 · Elizabeth, Colorado Join us for a community celebration in the heart of Elizabeth! Our 5K Run/Walk winds through historic...
5K
3
AUG
29

Aurora, CO
• 63.9 miles
$20 -$50
Dog-friendly trail 5K with pancake breakfast and vendor marketplace for PAWSitivity
5K
126