Found 174 races near Castle Rock, CO

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JUN
23

Louisville, CO
• 53.9 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
• 49.7 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
• 52.2 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
• 36.4 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
• 56.2 miles
$45
Community 5K run/walk at Robert F. Clement Park before the fourth of July.
5K
37
JUN
27

Denver, CO
• 46.3 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
• 40.1 miles
$20
Free fun run 5k, yoga, and beer mile at a fitness expo in Arvada, CO
5K
23
JUN
27

Boulder, CO
• 50.1 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
• 35.4 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
• 29.2 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
• 18.7 miles
$10 -$25
Community 1.5-mile run/walk in Littleton, CO raising concussion and CTE awareness.
9
JUL
4

Arvada, CO
• 48.3 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
• 36.6 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
• 53.6 miles
$40 -$45
17th annual flat-and-fast 4K fun run in Boulder with a post-race party.
4K
10
JUL
4

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

Littleton, CO
• 50.2 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
• 49.6 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
• 52.7 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

Colorado Springs, CO
• 54.1 miles
IF YOU HAVE A FOREVER BIB THERE IS NO NEED TO REGISTER.  YOU ARE ALREADY PRE-REGISTERED EACH MONTH. RACE STARTS AT 8:00 A.M.   THE START LINE CLOSES AT 8:05 A.M. This is a 2 mile race held the...
5
JUL
4

Palmer Lake, CO
• 19.7 miles
$20 -$50
Charity fun in Palmer Lake benefiting important causes with great community spirit
119