Found 173 races near Adams County, CO

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AUG
8

Arvada, CO
• 47.8 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
• 42.0 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
• 39.9 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
• 53.3 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
• 12.5 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
• 44.1 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
• 45.8 miles
$25 -$50
                                               Run the Race. Stay for the Party. 
5K
3
AUG
15

Centennial, CO
• 17.9 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
• 34.2 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
• 48.5 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
• 39.0 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
• 48.3 miles
$45 -$85
5K road featuring competitive racing and community celebration
5K Half Marathon
129
AUG
22

Centennial, CO
• 8.9 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

Westminster, CO
• 40.6 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
AUG
22

Denver, CO
• 39.0 miles
$20 -$40
Run in Denver, CO with t-shirt
1m 5K
32
AUG
23

Westminster, CO
• 26.7 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
• 34.3 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
27

Commerce City, CO
• 35.2 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
AUG
29

Littleton, CO
• 46.5 miles
$35 -$75
Glow & Roll is an inclusive, dusk-time 5K Walk/Run/Roll (with a 1.6-mile option) A glow-filled, twilight experience with lights, music and day-glow swag that transforms the event into a...
1m 5K
3
AUG
29

Elizabeth, CO
• 39.5 miles
$10 -$25
Elizabeth Main Street 5K Run/Walk & Family Color Run August 29, 2026 · Elizabeth, Colorado Join us for a community celebration in the heart of Elizabeth! Our 5K Run/Walk winds through historic...
5K
2