Found 177 races

🎉 Join Your Local Running Community!

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

AUG
1

Parker, CO
• 14.7 miles
$25
Sensory-friendly two-mile Walk/Run/Roll for all abilities in Parker, CO, with bike ride option.
2m
4
AUG
1

Highlands Ranch, CO
• 15.9 miles
$17 -$56
5K road featuring competitive racing and community celebration
0m 5K
52
AUG
6

Boulder, CO
• 26.9 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
14
AUG
6

Eldorado Springs, CO
• 25.7 miles
$30
A scenic four-mile charity run through Eldorado Canyon benefiting the Colorado Cancer Foundation.
16
AUG
7

Centennial, CO
• 12.5 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
90
AUG
8

Arvada, CO
• 17.2 miles
$35 -$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
199
AUG
8

Centennial, CO
• 14.0 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
65
AUG
8

Longmont, CO
• 15.4 miles
$20 -$45
A 3.5 mile race around Lake McIntosh in Longmont, CO on a half paved/half dirt course; dogs encouraged, benefits Longmont Humane Society.
11
AUG
8

Berthoud, CO
• 104.0 miles
$5 -$75
Inaugural Berthoud Gastro Dash 10K. Run Fast. Eat Faster.
10K
38
AUG
8

Strasburg, CO
• 29.1 miles
Check-in at 7:00am, race starts at 7:30am - Race Day Registrations will be accepted. FUNDRAISER: SHS Cross Country Team COURSE DETAILS: 2-1/2 loops on MVF's prayer path. 70% crushed asphalt, 20%...
5K
1
AUG
9

Strasburg, CO
• 28.1 miles
Check-in at 7am (race begins 7:30am). Register online by 8/5/25 – race day registration available. Runners, walkers, and strollers all welcome. Pancake breakfast INCLUDED in registration!...
5K
3
AUG
9

Littleton, CO
• 14.2 miles
$20 -$25
Western Welcome Week 5K at Hudson Gardens; registration includes the pancake breakfast.
5K
6
AUG
9

Denver, CO
• 10.6 miles
$30 -$40
Berkeley Circuit Race Schedule:8:30- Free and Fun Kids Quarter Mile (no registration necessary, just show up to race!) 8:45- Community One Mile Race (all paces welcome- walkers, strollers,...
2
AUG
9

Lakewood, CO
• 14.0 miles
$30 -$50
Community first summer race morning at Addenbrooke Park with a timed 5K, relaxed Hot Lap, and kids run.
5K
5
AUG
15

Centennial, CO
• 11.8 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
30
AUG
15

Greeley, CO
• 104.2 miles
$25
The Frontier Academy Community 5K is meant to serve the community of Greeley and the surrounding area. Through this race we hope to fulfill the vision and mission of our school - 'Building...
5K
5
AUG
15

Denver, CO
• 3.2 miles
A 7th annual 2-mile Walk, 5K Run, and Relax fundraiser in Denver for migraine research.
2m 5K
27
AUG
15

Longmont, CO
• 30.8 miles
$10 -$40
Family-oriented 5K and 1 Mile run/walk in Longmont, CO, raising funds for St. Vrain Valley Schools educator grants.
1m 5K
8
AUG
15

Highlands Ranch, CO
• 47.6 miles
$10 -$25
Every year TRXC hosts a race to begin the season and celebrate ThunderRidge High School Cross Country.  This season we will be holding a Grizzly 2-mile on the ThunderRidge campus to get the...
2m
AUG
16

Denver, CO
• 7.5 miles
$40 -$55
5K run/walk fundraiser for Cancer League of Colorado, funding cancer research and patient services.
5K
8