Found 178 races

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JUN
23

Louisville, CO
• 6.6 miles
$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
• 12.2 miles
$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
26

Bailey, CO
• 40.0 miles
$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
• 24.0 miles
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
• 19.9 miles
$45
Community 5K run/walk at Robert F. Clement Park before the fourth of July.
5K
37
JUN
27

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

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

Georgetown, CO
• 35.2 miles
$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
28

Idaho Springs, CO
• 25.4 miles
$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
• 19.6 miles
$10 -$25
Community 1.5-mile run/walk in Littleton, CO raising concussion and CTE awareness.
9
JUL
4

Arvada, CO
• 6.9 miles
$5 -$6
Novelty mile at Colorado Tap House, Arvada: eat 10 donut holes across four quarter-mile loops.
9
JUL
4

Castle Rock, CO
• 38.5 miles
$43 -$55
Please visit our official race website at www.runtochangelives.org for more registration options.
1K 5K Half Marathon
10
JUL
4

Boulder, CO
• 13.5 miles
$40 -$45
17th annual flat-and-fast 4K fun run in Boulder with a post-race party.
4K
10
JUL
4

Tabernash, CO
• 37.9 miles
First annual 5K/15K run and walk at Devil's Thumb Ranch, Tabernash, CO on July 4.
5K 15K
13
JUL
4

Greeley, CO
• 40.1 miles
$35 -$45
Celebrate the Fourth of July with run.Windsor in Greeley, Colorado as we bring back the annual July 4th Freedom 5k walk and run, along the Greeley Stampede 4th of July Parade Route! Participants...
5K
73
JUL
4

Littleton, CO
• 24.3 miles
$55 -$65
Kick off your 4th of July with a family-friendly and festive 5K on Saturday, July 4, beginning at 7:30 a.m.! Celebrate Independence Day with a fun morning on the move — this spirited run/walk...
5K
37
JUL
4

Buena Vista, CO
• 65.6 miles
$30 -$35
Join us for the Independence Day 5K in Buena Vista, CO on July 4th, 2025!  
3K 5K
16
JUL
4

Louisville, CO
• 50.1 miles
$45 -$65
Let Freedom Run 5k/10k - Louisville in Louisville - 5K, 10K. Register today for this exciting race!
0m 5K 10K
240
JUL
4

Longmont, CO
• 40.2 miles
$45 -$55
Dress up as your favorite American Hero! This could be your mom, dad, Albert Einstein, Batman, Superman, or the Powerpuff girls! This event is all about celebrating GREAT people who do and have...
0m 5K
57