Found 295 races

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JUN
23

Louisville, CO
$30
A 5K (ish) for our school, our kids, and our community. Join us for The Red Schoolhouse Run — a fundraiser run benefiting Jefferson Street Preschool! From stroller-pushers to seasoned runners,...
9
JUN
25

Boulder, CO
$20
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. We are back at CU Pott’s Field on...
15
JUN
25

Alma, CO
$10 -$155
At Town Park finisher beer, trail, scenic, family-friendly
6m 10K 13m Half Marathon 26m 40m
76
JUN
26

Bailey, CO
$10 -$20
A first-annual dog-friendly 5K on Dump Road in Bailey, CO benefiting local non-profit Peaceworks.
5K
11
JUN
27

Evergreen, CO
DescriptionCome run with us in beautiful Evergreen at Alderfer/3 Sisters Park!This race day will offer a 10k race coursing through the amazing park.Play fun games from our rec trailer, visit our...
10K
27
JUN
27

Littleton, CO
$45
Community 5K run/walk at Robert F. Clement Park before the fourth of July.
5K
37
JUN
27

Denver, CO
$50 -$60
The Denver Pride 5K is more than just a race—it's a powerful way for supporters of The Center on Colfax to make a difference in the lives of Colorado’s LGBTQ+ community. This event serves as a...
5K
16
JUN
27

Arvada, CO
$20
Free fun run 5k, yoga, and beer mile at a fitness expo in Arvada, CO
5K
23
JUN
27

Boulder, CO
$25 -$45
The 29th Downtown Boulder Pearl Street Mile, a night of 1-Mile criterium races on the Pearl Street Mall.
21
JUN
27

Steamboat Springs, CO
$35 -$55
Come join us for an exciting new race as part of the SBT GRVL race weekend. Experience the challenging yet beautiful trails at the historic Howelsen Hill ski area, one of the oldest in the...
5K 10K
24
JUN
27

Georgetown, CO
$35 -$150
Hey Beautiful Slackers!   The 2026 Slacker Races will be held on June 27  Start Time 7:30am     There will be NO RACE DAY REGISTRATION  Get ready for an epic adventure at the 2026 Slacker...
4m Half Marathon
46
JUN
27

Glenwood Springs, CO
$50 -$110
Welcome to the Sunlight Mountain Race Series brought to you by Arc'teryx Aspen, where mountain air, winding trails, and a vibrant community come together for an unforgettable summer of running....
5K 10K Half Marathon
25
JUN
27

Bellvue Colorado
A scenic trail race at Lory State Park near Fort Collins, CO with 5K, 5 mile, and 10 mile distances.
5K 5m 10m
35
JUN
27

Ridgway, CO
$25
About the Event This event highlights everything there is to love about the Ridgway area.  The 10-mile race is run on a lollipop course with magnificent views of the San Juan Mountains.  The...
7
JUN
28

Idaho Springs, CO
$175 -$185
Although the air will be noticeably thin at the starting line, Echo Lake's 10,600 feet of elevation is just the beginning. The climb totals nearly 4,000 vertical feet - much of it above treeline...
14m
26
JUN
28

Littleton, CO
$10 -$25
Community 1.5-mile run/walk in Littleton, CO raising concussion and CTE awareness.
9
JUL
2

Durango, CO
$30 -$75
Three-race Durango summer trail series partnered with local breweries; July 2 kickoff at Horse Gulch.
16
JUL
3

Granby, CO
The course runs through Kaibab Park as well as downtown Granby! Start and finish areas are at the Destination Granby offices (516 East Agate Ave.). The course elevation is 7,935 feet. The run is...
5K
15
JUL
4

Telluride, CO
$60
Uphill July 4th trail race in Telluride, CO for the Good Neighbor Fund.
19
JUL
4

Aspen, CO
$65 -$150
Join us for the 40th Annual Boogie's Buddy Race, Presented by Aspen Valley Health!Saturday, July 4, 2026  Rio Grande Park Aspen: 427 Rio Grande Pl, Aspen Kick off your Fourth of July weekend at...
1m 5K 5m
46