Found 110 races

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DEC
6

Westminster, CO
• 100.3 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
12

Windsor, CO
• 59.7 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
• 99.7 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
31

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

Fort Collins, CO
• 56.4 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
MAR
13

Westminster, CO
• 101.5 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
APR
24

Westminster, CO
• 102.3 miles
$20 -$85
Unleash your inner superhero at the 15th Annual Beat the Heat event! This year, we're calling all champions to assemble where one of Colorado's favorite trails joins one of its most glorious...
5K 10K Half Marathon
10
MAY
2

Boulder, CO
• 91.7 miles
Rise Against Suicide's 17th annual Emerge 5K Walk/Run Join Rise Against Suicide's 17th annual Emerge 5K Walk/Run- a free, family-friendly walk/run supporting youth mental health and suicide...
5K
1
MAY
2

Fort Collins, CO
• 55.3 miles
$40 -$235
Early Bird Registration will open on July 1, 2026. Join us for the Colorado Marathon in Fort Collins next May! Our annual event takes place in the stunning Poudre Canyon and the gorgeous natural...
5K 10K Half Marathon Marathon
5
MAY
9

Westminster, CO
• 101.5 miles
$35 -$80
DescriptionWe are excited for the 2027 Colorado Women's Classic! While focused on women, all genders are WELCOME at this event!   We will run this event rain or shine! :) This is THE race for...
0m 5K 10K 10m
3
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