Found 177 races

🎉 Join Your Local Running Community!

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

AUG
16

Erie, CO
• 22.6 miles
$45 -$85
5K road featuring competitive racing and community celebration
5K Half Marathon
141
AUG
22

Centennial, CO
• 13.0 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
14
AUG
22

Evergreen, CO
• 27.6 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
25
AUG
22

Louisville, CO
• 20.0 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
2
AUG
22

Westminster, CO
• 13.5 miles
$45 -$55
A 28th-annual 5K supporting SLHS, with $15 of each fee going to a team of your choice.
5K
4
AUG
22

Denver, CO
• 7.1 miles
$20 -$40
Run in Denver, CO with t-shirt
1m 5K
36
AUG
22

Pine, CO
• 33.6 miles
$110 -$130
Scenic singletrack trail marathon and half marathon in Staunton State Park, Colorado.
Half Marathon Marathon
62
AUG
23

Westminster, CO
• 14.3 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
315
AUG
23

Denver, CO
• 3.3 miles
$10 -$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
29
AUG
24

Evergreen, CO
• 27.2 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...
7
AUG
27

Commerce City, CO
• 4.9 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...
6
AUG
29

Littleton, CO
• 16.0 miles
$35 -$75
Inclusive dusk-time 5K/1.6-mile Walk/Run/Roll at Clement Park with lights, music and glow swag.
1m 5K
5
AUG
29

Elizabeth, CO
• 31.4 miles
$10 -$25
A community 5K through historic Elizabeth Main Street plus an untimed Family Color Run.
5K
5
AUG
29

Aurora, CO
• 12.6 miles
$20 -$50
Dog-friendly trail 5K with pancake breakfast and vendor marketplace for PAWSitivity
1m 5K
127
AUG
29

Allenspark, CO
• 46.5 miles
$20 -$55
Hello Runners and Dog Lovers! Welcome to the 14th annual Run Like The Wind 5k / 2k run in Allenspark on Labor Day weekend - Saturday, August 29th at 9am, hosted by the Old Gallery.  Register now...
2K 5K
12
AUG
30

Lone Tree, CO
• 16.4 miles
$30 -$35
Rolling hills and beautiful views are all a part of this challenging 8K trail run through the Bluffs Regional Park.   For this race, we ask people only register if they are able to keep at least...
8K
3
SEP
5

Arvada, CO
• 19.7 miles
$25
Lace up your shoes and join us for the Demon Dash at its new course at the NAAC! We're excited to bring this course its new home and onto dirt! Whether you are a runner or walker, this will be a...
5K
23
SEP
5

Brighton, CO
• 14.9 miles
$55 -$150
Introducing the Raising the Barr Ultra Race.  Try to finish as many 10 mile loops around the lake in the first 4 or 10 hours and then switch to 1 mile loops for the last few hours of your race....
10
SEP
7

Loveland, CO
• 46.5 miles
$65
See the Northern Colorado All-Ability communities come together in faith and sports through FCA All-Abilities. We are running for: Awareness of sports programs for all ages for individuals with...
5K
7
SEP
7

Loveland, CO
• 47.2 miles
$10 -$65
Join us for the Labor Day 5kSee the Northern Colorado All-Ability communities come together in faith and sports through FCA All-Abilities. We are running for: Uniting All-Abilities through faith...
5K
5