Found 222 races

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JUN
27

Boulder, CO
• 78.3 miles
$20 -$45
Join us for the 29th running of the Downtown Boulder Pearl Street Mile on Saturday June 27th, all taking place on the Pearl Street Mall. It is a massive night of 1-Mile races on our criterium...
15
JUN
27

Georgetown, CO
• 107.0 miles
$35 -$150
$55.55 New Year’s Eve Pricing The gnome picked the number.New beginnings, big changes, zero regrets.   Hey Beautiful Slackers!   The 2026 Slacker Races will be held on June 27  Start Time...
4m Half Marathon
42
JUN
27

Bellvue Colorado
• 76.0 miles
Crisp morning air and a summer sunrise in Colorado. YES PLEASE! Join us on the foothills at Lory State Park for a fun & beautiful morning trail race experience. This run race features three...
5K 5m 10m
33
JUN
28

Idaho Springs, CO
• 36.2 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...
24
JUN
28

Littleton, CO
• 78.2 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...
3
JUL
4

Arvada, CO
• 78.2 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...
6
JUL
4

Castle Rock, CO
• 83.4 miles
$43 -$55
Please visit our official race website at www.runtochangelives.org for more registration options.
1K 5K Half Marathon
7
JUL
4

Boulder, CO
• 75.1 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
6
JUL
4

Fort Collins, CO
• 69.2 miles
$10 -$55
Friday July 4th, 2026 Walk ⭐️ Jog ⭐️ Run ⭐️ Race Kick off your holiday festivities with a 5k in City Park, Fort Collins Start your Fourth of July with movement, community, and celebration at the...
5K
37
JUL
4

Greeley, CO
• 50.5 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
70
JUL
4

Littleton, CO
• 80.2 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
35
JUL
4

Buena Vista, CO
• 79.0 miles
$30 -$35
Join us for the Independence Day 5K in Buena Vista, CO on July 4th, 2025!  
3K 5K
14
JUL
4

Louisville, CO
• 74.0 miles
$40 -$65
Let Freedom Run 5k/10k - Louisville in Louisville - 5K, 10K. Register today for this exciting race!
0m 5K 10K
239
JUL
4

Longmont, CO
• 68.6 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
56
JUL
4

Colorado Springs, CO
• 112.6 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...
2
JUL
4

Palmer Lake, CO
• 98.2 miles
$20 -$50
Charity fun in Palmer Lake benefiting important causes with great community spirit
119
JUL
4

Red Feather Lakes, CO
• 100.6 miles
$50
Enjoy a scenic fun run in and around Red Feather Lakes, Colorado including a route through Fox Acres Golf Course! Start at and finish at The Tavern at Red Feather Lakes for an expo in the parking...
3m
47
JUL
6

Boulder, CO
• 79.0 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...
17
JUL
9

Boulder, CO
• 87.2 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
10
JUL
11

Westminster, CO
• 75.8 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
175