Found 28 races

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JUL
18

Aspen, CO
• 72.5 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
• 45.7 miles
$10 -$30
Laid-back community Firefighter 5K and Doggie Dash in Alma, CO with a pancake breakfast.
5K
37
JUL
18

Steamboat Springs, CO
• 38.6 miles
$35 -$55
9.5 Mile and 5K trail run in the Steamboat Springs Running Series, northern Colorado mountains.
5K 9m
35
JUL
25

Aspen, CO
• 41.1 miles
$100 -$260
http://www.aspenvalleymarathon.com
Half Marathon Marathon
59
AUG
1

Craig, CO
• 0.0 miles
$30
Kick off an unforgettable weekend at the Moffat County Hot Air Balloon Festival with our vibrant, can’t-miss Flying Colors 5K Fun Run/Walk!  Join us at Loudy Simpson Park for a lively stroll or...
1m 5K
45
AUG
1

Fairplay, CO
• 59.4 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
9

Leadville, CO
• 12.5 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
22

Grand Junction, CO
• 11.3 miles
$20
Warrior Waterfront 5K - You can pick up your race bibs on the morning of the race between 8:00-9:00am at the shelter at Las Colonias Park (1461 Riverfront Dr.). Come join us for the 2nd Warrior...
5K
12
AUG
29

Steamboat Springs, CO
• 40.5 miles
Trail run in the northern Colorado mountains with 50k, 16 Mile, and 5 Mile options.
5m 16m 50K
33
SEP
5

Keystone, CO
• 23.4 miles
$80 -$90
Prizes Prizes will be distributed at the end of each race and for the overall series winners
71
SEP
7

Oak Creek, CO
• 35.1 miles
$25
The Running Series is excited to have the Oak Creek No Fun Run on our schedule again! Please join us in remembering long-time Running Series competitor Larry Brooks, a former organizer of the Oak...
5K
50
SEP
12

Grand Junction, CO
• 10.3 miles
$10 -$45
Spirit in Grand Junction, CO - t-shirt, run or walk
1K 3m 5K
133
SEP
12

Loma, CO
• 26.4 miles
$50
A fresh take on trail running that ditches the big-budget hype for pure, no frills adventure. Forget the lottery entries, $200+ fees, swag bags, and finish line blow up arches. This is trail...
31
SEP
26

Fruita, CO
• 101.6 miles
$25 -$35
MESA COUNTY SEARCH & RESCUE 5K RACE, September 26th 2026, in conjunction with Fruita Fall Festival SUPPORT OUR MISSION TO RESCUE AND SAVE LIVES   COST: EARLY REGISTATION By SEP 6th: 13 and under:...
5K
21
SEP
26

Oak Creek, CO
• 39.6 miles
$20 -$25
A flat 5K fun run overlooking Stagecoach State Park Reservoir with flapjack breakfast.
5K
15
SEP
27

Grand Junction, CO
• 11.8 miles
$35
Grand Valley Brew Runs is a series of holiday themed 5k run/walks in the valley. Come run from our local partner locations and finish with a brew or hot chocolate, games, music, and more. Kids 12...
5K
6
OCT
3

Steamboat Springs, CO
• 37.3 miles
$25 -$50
12K, 4 Mile and Fun Run trail race in the Steamboat Springs Running Series, northern Colorado mountains.
4m 12K
60
OCT
4

Aspen, CO
• 103.0 miles
$60 -$65
Halloween-themed dog-friendly 5.6K run/1 mile walk benefiting the Aspen Animal Shelter at Koch Park.
1m
69
OCT
10

Breckenridge, CO
• 116.5 miles
$25 -$150
A two-day Breckenridge running festival with five distances from 5K to full marathon.
5K 10K Half Marathon Marathon
34
OCT
10

Grand Junction, CO
• 11.3 miles
$30 -$40
Family-friendly 5K raising kidney disease awareness and supporting local dialysis patients.
5K
34