Found 26 races near Denver, CO

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JUN
13

Arvada, CO
• 8.3 miles
$40 -$85
Join us for our 14th annual Summer Breeze, benefiting the Food Bank of the Rockies! This event features 5K, 10K, and Half Marathon courses that meander along the Van Bibber Creek Trail, offering...
5K 10K Half Marathon
526
JUN
27

Georgetown, CO
• 68.2 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
JUL
4

Castle Rock, CO
• 26.9 miles
$43 -$55
Please visit our official race website at www.runtochangelives.org for more registration options.
1K 5K Half Marathon
6
JUL
11

Westminster, CO
• 10.7 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
174
JUL
11

Littleton, CO
• 14.1 miles
$17 -$85
Join us for the Heatwave Half Marathon, 10K, & 5K!A sun-soaked summer challenge that’s perfect for the whole family. The fun includes – Great Swag – designer shirt & custom medalChip-timing with...
1m 5K 10K Half Marathon
47
JUL
18

Castle Rock, CO
• 23.1 miles
$40 -$95
Join runners in Castle Rock for this half marathon.
5K 10K Half Marathon
301
AUG
8

Arvada, CO
• 11.1 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
15

Centennial, CO
• 14.9 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
28
AUG
16

Erie, CO
• 22.1 miles
$45 -$85
5K road featuring competitive racing and community celebration
5K Half Marathon
135
AUG
22

Evergreen, CO
• 67.6 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
• 85.2 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

Pine, CO
• 54.7 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
• 11.3 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
291
SEP
7

Parker, CO
• 11.2 miles
$33 -$85
Celebrate the last blast of summer at the Labor Day Half Marathon
5K 10K Half Marathon
76
SEP
19

Westminster, CO
• 10.7 miles
$25 -$85
One of Colorado's favorite trails meets one of its most glorious parks at our 9th annual Fallfest! As courses wind southwest along Big Dry Creek Trail, the remarkable sight of Standley Lake with...
5K 10K Half Marathon
305
SEP
19

Buena Vista, CO
• 26.8 miles
$30 -$100
Annual run in Buena Vista with supportive community atmosphere and race day excitement
5K 10K Half Marathon
267
SEP
26

Estes Park, CO
• 51.3 miles
$90 -$265
​Join us for the Estes Epic on September 26-27, 2026 —a premier event featuring a 50k Bike Race, 50k Run, and Heavy Half Marathon. After a six-year hiatus, this challenging race returns, offering...
Half Marathon 50K
39
SEP
27

Boulder, CO
• 24.6 miles
$40 -$500
This is a virtual race open to supporters across the country who want to take action for children and families. Participants can run, walk, or move in their own community while supporting a...
5K 10K Half Marathon
17
OCT
11

Westminster, CO
• 11.3 miles
$45 -$85
Join the WESTY HALF and 5k this fall! The Hometown Race Series features half marathons and 5k distance events in outlying communities outside the Denver and Boulder metro areas.  Whatever...
5K Half Marathon
89
OCT
18

Denver, CO
• 0.3 miles
10K Half Marathon
32