Found 210 races

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JUL
10

Como, CO
• 44.1 miles
The Human Potential Running Series Presents: The Silverheels Trail Runs @ COMO ROUNDHOUSE The Silverheels Trail Runs ...
60K 100K
84
JUL
11

Denver, CO
• 10.1 miles
$36 -$40
Cookie Chase in Denver, CO - annual community running event featuring great community spirit and atmosphere
5K
52
JUL
11

Denver, CO
• 17.0 miles
An inclusive 1-5K walk, run & roll in Denver hosted by the Assoc. of Black Psychologists.
1K 2K 3K 4K 5K
18
JUL
11

Littleton, CO
• 10.4 miles
$17 -$85
Join us for the Heatwave Half Marathon, 10K, & 5K!A sun-soaked summer challenge that’s perfect for the whole family. The fun includes – Great Swag – designer shirt & custom medalChip-timing with...
1m 5K 10K Half Marathon
55
JUL
11

Cheyenne, WY
• 53.2 miles
The 12th annual Will Run for Cannoli 5k is a family fun run/walk and will be held on July 11, 2026 at Lions Park in Cheyenne. Participants can expect a fun course, age division prizes, raffles, a...
5K
38
JUL
12

Lakewood, CO
• 5.2 miles
$10 -$15
Rocky Mountain Road Runners holds a monthly Trophy Series in the Denver area.  We provide a low-key, low-cost racing environment. Everyone is welcome to run with us! The race uses a handicap...
2m
54
JUL
13

Keystone, CO
• 40.0 miles
High altitude running camp for HS athletes
63
JUL
15

Commerce City, CO
• 17.5 miles
DescriptionSpend time in the original home of the Arapaho, Cheyenne, Lakota, and Ute people of Colorado. Emphasizing the history, cultural practices, and stewardship of indigenous people, a Park...
2
JUL
18

Denver, CO
• 11.3 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
19
JUL
18

Aspen, CO
• 63.1 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
56
JUL
18

Aurora, CO
• 19.9 miles
$7
On-campus 5K hosted by the CU Anschutz Run Club, raising money for DAWN, the free clinic.
5K
12
JUL
18

Alma, CO
• 53.0 miles
$10 -$30
Laid-back community Firefighter 5K and Doggie Dash in Alma, CO with a pancake breakfast.
5K
33
JUL
18

Littleton, CO
• 11.0 miles
$35 -$40
The 9th Annual Heritage Eagles 5K on the Liberty Bell course benefits the Heritage HS Cross Country Team.
5K
80
JUL
18

Steamboat Springs, CO
• 66.2 miles
$35 -$55
9.5 Mile and 5K trail run in the Steamboat Springs Running Series, northern Colorado mountains.
5K 9m
34
JUL
18

Castle Rock, CO
• 23.0 miles
$45 -$95
Join runners in Castle Rock for this half marathon.
5K 10K Half Marathon
331
JUL
19

Greeley, CO
• 16.4 miles
$25 -$40
Veteran suicide awareness 5k and 1 mile run benefiting NCVRC, with medal, shirt, and after party.
1m 5K
18
JUL
23

Boulder, CO
• 24.8 miles
$20
USATF-sanctioned all-comers summer track and field meet at CU Potts Field in Boulder, CO.
3K
17
JUL
24

Loveland, CO
• 6.0 miles
$25
Loveland, CO memorial 5K honoring Ryan Vomacka, supporting Mountain View High School running programs.
5K
22
JUL
25

Aspen, CO
• 63.2 miles
$100 -$260
http://www.aspenvalleymarathon.com
Half Marathon Marathon
55
JUL
25

Pine, CO
• 14.9 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
36