Found 237 races

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Connect with runners, find training partners, and celebrate every finish together

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
• 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...
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
• 71.3 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
• 79.1 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
• 79.1 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
• 87.9 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
• 56.2 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
AUG
22

Denver, CO
• 63.4 miles
$20 -$40
Run in Denver, CO with t-shirt
1m 5K
32
AUG
22

Pine, CO
• 89.5 miles
$110 -$130
Welcome to the Staunton Rocks! Marathon & Half, an event put on by trail runners for trail runners. Touring the renowned singletrack of Staunton State Park in Colorado’s Front Range Mountains...
Half Marathon Marathon
60
AUG
23

Westminster, CO
• 58.0 miles
$40 -$95
Welcome to the Pioneer Prairie Dog Half Marathon event; the one that started the series! With 10k and 5k events too!  Everyone is back to school and slipping into a routine.  Make this your...
5K 10K Half Marathon
271
AUG
23

Denver, CO
• 61.6 miles
$8 -$55
Be part of something bigger at Conservation Colorado’s second annual Rebel Run 5K — where movement meets momentum for our climate, air, land, water and communities. Last year, more than 230...
5K
24
AUG
25

Bellvue, CO
• 45.8 miles
$25 -$30
Join us August 5, 12, 19 & 26 for a fun series of shorter midweek trail races. This fourth race of the series will take place on the fast and flat Valley Trail at Lory State Park. Our goal is to...
12K
24
AUG
27

Commerce City, CO
• 57.9 miles
DescriptionPut your problem-solving skills to the test in this exciting puzzlingcompetition! Participants will race against the clock to completea 300-piece jigsaw puzzle. Whether you’re a...
5