Found 295 races

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

DEC
5

Red Feather Lakes, CO
• 104.4 miles
$35
Enjoy a scenic little dash in and around Red Feather Lakes, Colorado! Wear your favorite onesie (and layer it underneath if you need extra warmth!). Start at The Tavern at Red Feather Lakes and...
34
DEC
5

Pine, CO
• 24.3 miles
$60 -$150
The Human Potential Running Series Presents: The Sawmill Trail Runs @ Staunton State Park The Sawmill Trail Runs; first started as a “Fat Ass” event at White Ranch Open Space in Golden, CO in...
50K
DEC
5

Loveland, CO
• 72.4 miles
$30 -$80
Each race will run through a part of Loveland we haven’t highlighted until this race. You can pick which distance you want to run! Bring a new, unwrapped toy to the start line and be ready for...
5K 10K 15K
42
DEC
6

Westminster, CO
• 37.3 miles
$22 -$48
Join us for the annual Candy Cane Course 5k/10k/15k!  A fun, Christmas-themed event that is perfect for the whole family.The fun includes - Great Swag - designer shirt & custom medal Chip-timing...
1m 5K 10K 15K
18
DEC
6

Denver, CO
• 22.7 miles
$10 -$15
Rocky Mountain Road Runners (RMRR) holds a monthly Trophy Series race in the Denver area. Our December race will be in Denver's Washington Park with a 4.5 mile course for all runners.  Please...
4m
26
DEC
6

Pueblo, CO
• 78.0 miles
$35 -$60
It's our 40th Anniversary Race!  Choose the 13.1 or the 5k!  December 6th, 2026: 8:30am at Pueblo City park pavilion, 801 Goodnight Ave. 81005 It is exciting to bring you another exquisite day of...
5K Half Marathon
11
DEC
12

Windsor, CO
• 77.0 miles
$15 -$62
Santa Catch 5K, 10K and 1 Mile Kids Fun RunSaturday December 12, 2025Windsor Lake, Windsor CO Start your holiday season with the joy of running, with courses around Windsor Lake and the Canal...
1m 5K 10K
34
DEC
12

Thornton, CO
• 36.7 miles
$16 -$45
Kick off the holiday season with a spirited run/walk at Thornton's Carpenter Park. Choose from the chip-timed 5k, or experience the festive atmosphere in a shorter distance in our untimed Fun...
5K 75m
31
DEC
19

Denver, CO
• 25.7 miles
$37 -$59
 The Santa's Dash for Cash event is a celebration of Slo-Hi/Denver and EVERY finisher will get a bonus envelope! Some of the gift envelopes contain CA$H, at least one envelope includes $100! 5k...
5K
32
DEC
20

Denver, CO
• 23.1 miles
$30 -$40
Get into the holiday spirit with the Ugly Sweater 5K! Runners and walkers, young and old, are invited to join us at Washington Park in Denver for a flat, fast 5K. Dress in a tacky sweater – the...
5K
50
DEC
26

Centennial, CO
• 19.1 miles
$30 -$45
🎉 Start Your Year on the Right Foot! 🏃‍♀️🏃‍♂️Join the New Year's Run - New Beginnings Starts Today!Kick off the new year with energy, excitement, and a community of runners ready to chase their...
1m 5K 10K Half Marathon
2
DEC
31

Lyons, CO
• 61.6 miles
$10 -$50
This is a Test
12K
3
DEC
31

Fort Collins, CO
• 82.7 miles
$25 -$35
RESULTS 2025 Run out the old year, and welcome the new! One of Fort Collins’ oldest races, the Resolution Run, is back for its 42nd year! Get a head start on your New Year's Resolution by...
5K
15
JAN
1

Arvada, CO
• 30.9 miles
$34 -$54
The Resolute Runner 5K is the KICK OFF PARTY OF THE YEAR! It's time to be RESOLUTE, to retroactively earn your pumpkin pie and chocolate truffles, and to start the new year on the right foot,...
5K
28
FEB
6

Colorado Springs, CO
• 44.4 miles
$60 -$180
The Human Potential Running Series Presents:The Stories Trail Runs @ Cheyenne Mountain State Park The Stories Trail Runs is a unique winter trail running adventure taking place in Colorado...
10K Half Marathon
62
FEB
13

Arvada, CO
• 62.4 miles
$30 -$50
Are you a Heart Throb?  Grab your best running buddy and come on out to Johnny Roberts Memorial Park just down from Olde Town Arvada.  Celebrate the ability to get your heart pumping by cruising...
5K
47
FEB
28

Highlands Ranch, CO
• 82.8 miles
$38 -$65
Winter never disappoints us when racing in February in Highlands Ranch!  You won't feel chilly after a course so hilly!  After conquering the 5k, warm up with hot apple cider or hot cocoa at the...
5K
28
MAR
13

Salida, CO
• 79.9 miles
2027 Race Date is Saturday, March 13.  Registration will open on November 1.  Race Results will be updated live here throughout the day.Thank you to everyone for a great day at this year's Run...
2m Half Marathon Marathon
MAR
13

Westminster, CO
• 57.4 miles
$38 -$58
Join us for the annual Erin Go Bragh 7.77k! This is THE LUCKIEST race on earth! There may not be a real pot of gold at the finish line of this happy-go-lucky fun run, but there WILL be UNLIMITED...
7K
23
MAR
14

Severance, CO
• 38.4 miles
$15 -$95
Celebrate the luck of the Irish at Lucky Brew! All participants will receive chip timing, photos, Lucky Brew performance shirt and a great after party, complete with beverages, food, awards for...
5K 10K 15K Half Marathon