Found 212 races

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AUG
7

Centennial, CO
• 21.6 miles
$10 -$15
August may be hot...but still a great time to run, and we hope you'll come join the runners of RMRR. We'll run our August 5k on the Highline Canal around DeKoevend Park.  As always, everyone is...
5K
76
AUG
8

Arvada, CO
• 33.3 miles
$40 -$353
12th annual end-of-summer celebration on Ralston Creek Trail with Half Marathon, 10K, and 5K distances. Official BOLDERBoulder qualifier supporting veterans.
5K 10K Half Marathon
193
AUG
8

Centennial, CO
• 14.7 miles
$27 -$40
Run. Support. Celebrate.Join us for the 7th Annual Arapahoe Warrior 5K and support the Arapahoe Warrior Cross Country Team! With $10 from every registration going directly to the Arapahoe Cross...
5K
61
AUG
8

Longmont, CO
• 40.3 miles
$20 -$45
Come join us on August 8, 20226  for a race around the entirety of beautiful Lake McIntosh! This 3.5 mile race is a half paved/half dirt course surrounded by wonderful mountain views, vast...
10
AUG
8

Berthoud, CO
• 65.0 miles
$5 -$75
Eat. Run. Adopt. Join us for Berthoud’s first-ever community-driven 10k!  In partnership with Berthoud Pet Supply, this isn’t just a race—it’s a moving feast with a mission. A portion of race...
10K
35
AUG
8

Thornton, CO
• 34.6 miles
$17 -$48
Join us for the annual Summer Sizzler 5k/10k/15k!  A fun summer event that is perfect for the whole family. The fun includes - Great Swag - designer shirt & custom medal Chip-timing with live...
1m 5K 10K 15K
286
AUG
9

Littleton, CO
• 16.7 miles
$20 -$25
Work up an appetite for a deluxe breakfast at the Pancake Stampede 5K! The race is a part of Littleton's Western Welcome Week celebration, and is held before the annual pancake breakfast at...
5K
4
AUG
9

Lakewood, CO
• 24.4 miles
$25 -$50
                                               Run the Race. Stay for the Party. 
5K
3
AUG
11

Bellvue, CO
• 20.9 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their...
10K
20
AUG
15

Centennial, CO
• 19.1 miles
$30 -$45
🥯🏃‍♂️ Run for the carbs. Stay for the bagels.Love running? Love bagels? This one’s for you.Whether you’re chasing a workout or just here for the carbs, this run is all about balance, fun, and...
1m 5K 10K Half Marathon
27
AUG
15

Denver, CO
• 24.9 miles
Miles for Migraine will host its 6th annual 2-mile Walk, 5K Run and Relax Denver Event at Great Lawn Park. This event is a fundraiser for Migraine & Headache Awareness, Treatment & Research....
2m 5K
19
AUG
15

Longmont, CO
• 55.7 miles
$10 -$40
The Sunrise Stampede 5K and 1-Mile Fun Run/Walk is a community celebration that brings together neighbors, schools, students, families, educators, local businesses, and supporters from across St....
1m 5K
4
AUG
16

Denver, CO
• 23.1 miles
$40 -$55
The 30th Annual Cancer League of Colorado Race 4 Research 5K Run/Walk is excited to be back to the full event you love Sunday, August 16, 2026, at Washington Park, Denver! Run In-Person The race...
5K
AUG
16

Erie, CO
• 47.7 miles
$45 -$85
5K road featuring competitive racing and community celebration
5K Half Marathon
129
AUG
18

Bellvue, CO
• 87.6 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. Our goal is to offer a fun, low-key series of races designed to give newer trail runners an opportunity to dip their...
5K
24
AUG
22

Centennial, CO
• 16.6 miles
$39
Our annual 5K/10K Run or Walk to Support Susie's Higher-Ed Fund   We'll be returning to Family Worship Center for the start and finish of this year's 5K/10K.  Our event will take place on August...
5K 10K
12
AUG
22

Evergreen, CO
• 36.0 miles
DescriptionCome run with us in beautiful Evergreen to the top of Bergen Peak at gorgeous Elk Meadow Park!This race day will offer a 5k distance race through the lower sections of Elk Meadow...
5K
10
AUG
22

Evergreen, CO
• 36.0 miles
DescriptionCome run with us in beautiful Evergreen to the top of Bergen Peak at gorgeous Elk Meadow Park!This race day will offer a Half Marathon distance. The Half Marathon will take you to the...
Half Marathon Marathon
23
AUG
22

Fraser, CO
• 40.7 miles
$60 -$85
Push your limits with these stunning, remote races in the heart of the Rocky Mountains - located just 60 miles outsid...
5K Half Marathon
83
AUG
22

Westminster, CO
• 23.6 miles
$45 -$55
Now in its 28th year, the Jog in the Bog 5K is a fun opportunity to get active while supporting SLHS.    Registration includes a commemorative t-shirt, goodie bag, entry into prize drawing, and...
5K