Found 83 races near Keystone, CO

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JUL
18

Denver, CO
• 60.1 miles
$35
Join OCA Colorado for the annual 5K Panda Run & 1K Fun Walk, a fun-filled community event with a powerful purpose: helping local students pursue higher education right here in the Denver area,...
1K 5K
26
JUL
18

Aspen, CO
• 40.0 miles
$125 -$145
The Audi Power of Four Trail Run offers runners a scenic mix of trails across the mountains of Aspen Snowmass. Registrants can choose between the 3 distances offered including 50K, 25K & 10K.  
10K 25K 50K
63
JUL
18

Alma, CO
• 68.9 miles
$10 -$30
Laid-back community Firefighter 5K and Doggie Dash in Alma, CO with a pancake breakfast.
5K
37
JUL
18

Littleton, CO
• 16.7 miles
$40
The 9th Annual Heritage Eagles 5K on the Liberty Bell course benefits the Heritage HS Cross Country Team.
5K
83
JUL
23

Boulder, CO
• 6.6 miles
$20
USATF-sanctioned all-comers summer track and field meet at CU Potts Field in Boulder, CO.
3K
21
JUL
25

Aspen, CO
• 40.0 miles
$100 -$260
http://www.aspenvalleymarathon.com
Half Marathon Marathon
59
JUL
25

Pine, CO
• 35.8 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
44
AUG
1

Denver, CO
• 16.6 miles
$15 -$55
Together We Can End Impaired Driving For Good. The 2026 Move With MADD Denver is Mothers Against Drunk Driving (MADD)'s signature fundraising event to help us raise awareness and funds to end...
5K
8
AUG
1

Fairplay, CO
• 21.0 miles
$100 -$180
The Human Potential Running Series Presents: The Sheep Mountain Trail Runs @ Fairplay, CO Come ready my friends, this...
Half Marathon 50K 50m
105
AUG
6

Boulder, CO
• 6.6 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
33
AUG
6

Eldorado Springs, CO
• 28.4 miles
$30
A scenic four-mile charity run through Eldorado Canyon benefiting the Colorado Cancer Foundation.
21
AUG
8

Arvada, CO
• 50.2 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
208
AUG
8

Longmont, CO
• 24.4 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.
22
AUG
8

Berthoud, CO
• 19.5 miles
$5 -$60
Inaugural Berthoud Gastro Dash 10K. Run Fast. Eat Faster.
10K
48
AUG
8

Woodland Park, CO
• 18.0 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
13
AUG
9

Leadville, CO
• 1.8 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...
23
AUG
9

Littleton, CO
• 18.4 miles
$20 -$25
Western Welcome Week 5K at Hudson Gardens; registration includes the pancake breakfast.
5K
12
AUG
9

Denver, CO
• 48.7 miles
$35 -$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,...
7
AUG
9

Lakewood, CO
• 44.9 miles
$10 -$50
Community first summer race morning at Addenbrooke Park with a timed 5K, relaxed Hot Lap, and kids run.
5K
14
AUG
15

Longmont, CO
• 58.9 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
15