Found 205 races

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JUN
28

Idaho Springs, CO
• 20.9 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...
23
JUN
28

Littleton, CO
• 7.9 miles
$10 -$25
Cade's Cause Cade's Cause is a community event created to honor Dr. Cade Carlson, raise awareness about the lasting impact of concussions and repetitive head impacts, and turn our unimaginable...
2
JUL
3

Granby, CO
• 50.7 miles
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
12
JUL
4

Arvada, CO
• 9.4 miles
$5 -$6
Join us as we take on the Donut Hole Mile to be held as part of our 4th of July celebration! If you're familiar with a traditional Beer Mile, the donut hole mile is a fun twist for all ages! Run...
3
JUL
4

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

Boulder, CO
• 26.1 miles
$40 -$45
Join us for the 17th edition of the Avery Brewing Company 4K on the 4th, which is one of Boulder’s best running traditions to do on the 4th of July! July 4th is celebrated in a number of...
4K
5
JUL
4

Fairplay, CO
• 56.8 miles
$35
New for this year, the Burro Buster 5K takes runners on an exciting tour of Fairplay's River Park Trail, combining historic downtown streets, scenic trails, and beautiful mountain views. Starting...
5K
41
JUL
4

Tabernash, CO
• 39.9 miles
Devil's Thumb Ranch is happy to present the first annual 5K/15K running race and walk that will start at Devil’s Thumb Ranch Resort & Spa. The course consists of gentle rolling hills and moderate...
5K 15K
10
JUL
4

Littleton, CO
• 12.0 miles
$45 -$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
34
JUL
4

Buena Vista, CO
• 1.8 miles
$30 -$35
Join us for the Independence Day 5K in Buena Vista, CO on July 4th, 2025!  
3K 5K
13
JUL
4

Louisville, CO
• 19.8 miles
$40 -$65
Let Freedom Run 5k/10k - Louisville in Louisville - 5K, 10K. Register today for this exciting race!
0m 5K 10K
235
JUL
4

Longmont, CO
• 33.0 miles
$40 -$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
54
JUL
4

Palmer Lake, CO
• 41.8 miles
$20 -$50
Charity fun in Palmer Lake benefiting important causes with great community spirit
115
JUL
4

Winter Park, CO
• 38.4 miles
$40
Continue your 4th of July celebration and join us in beautiful Winter Park, Colorado Unfiltered, for the Rendezvous Run for Independence 5k Run/Walk.  The 5K run/walk starts at  the Gondola Plaza...
5K
18
JUL
6

Boulder, CO
• 23.3 miles
Nestled 5,430 feet above sea level, Boulder, Colorado is renowned as the heart of the running world, home to Olympic athletes and elite runners alike. This summer, experience the ultimate...
16
JUL
6

Keystone, CO
• 43.7 miles
$1350
High altitude running camp for HS athletes
39
JUL
9

Boulder, CO
• 23.1 miles
$20
NO Race Day Registrations 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...
1m
9
JUL
10

Como, CO
• 48.3 miles
$80 -$385
The Human Potential Running Series Presents: The Silverheels Trail Runs @ COMO ROUNDHOUSE The Silverheels Trail Runs ...
60K 100K
73
JUL
11

Westminster, CO
• 13.4 miles
$35 -$85
Get ready for a sun-soaked adventure and a fantastic mid-season challenge with our 13th Annual Dog Days 5K, 10K & Half Marathon, benefiting Do Over Dogs! Held in a central location between Denver...
5K 10K Half Marathon
173
JUL
11

Denver, CO
• 26.7 miles
$33 -$40
Cookie Chase in Denver, CO - annual community running event featuring great community spirit and atmosphere
5K
40