Found 176 races

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MAR
21

Golden, CO
• 23.0 miles
$20 -$85
All-Out Multicourse is proud to host our 15th Annual Spring Fever, a rewarding event for both novice and experienced athletes set against the backdrop of Table Mountain and the stunning Colorado...
5K 10K Half Marathon
39
MAR
28

Denver, CO
• 16.1 miles
$25 -$50
Is it spring or still winter?  We'll know when we run the Central Park 5k at the end of March!  Celebrate the end of winter with us on this flat and fast course in the historic Central Park...
5K
44
APR
4

Denver, CO
• 11.3 miles
$30 -$40
The Donut Dash 5K is Denver’s race that ends with donuts. Runners and walkers can take advantage of a flat and fast course, and then enjoy fresh donuts at the finish. Our mission is to bring...
5K
40
APR
11

Littleton, CO
• 4.7 miles
$40 -$255
Denver's oldest half-marathon, relay, and 5k along the scenic Platte River Trail in Littleton.
5K Half Marathon
6
APR
24

Westminster, CO
• 24.2 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
16
APR
25

Denver, CO
• 13.7 miles
$15 -$56
Ready to gallop around Denver with some friends?  Yeah, you are!  Come frolic with us at the Unicorn Runner 5k at Great Lawn Park to kick off your spring running season!  You'll earn a sweet tee...
2m 5K
7
MAY
1

Larkspur, CO
• 25.6 miles
$35 -$105
The Greenland Trail Race offers four outstanding distances in southern Douglas County. Run the 4 Miler, the 8 Miler, the 25K, or tackle the 50K ultramarathon, Colorado’s fastest 50K! With Pikes...
4m 8m 25K 50K
14
MAY
2

Boulder, CO
• 39.3 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
3
MAY
9

Westminster, CO
• 24.8 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
9
MAY
9

Denver, CO
• 14.5 miles
$26 -$39
Celebrate Mother’s Day in Motion at the 2027 Denver Mother’s Day 5K! Looking for a fun, active, and memorable way to celebrate Mother’s Day this year? Join us for the Denver Mother’s Day 5K—a...
5K
8
MAY
15

Divide, CO
• 42.3 miles
$60 -$160
The Human Potential Running Series Presents:The Endure Trail Runs @ Mueller State Park The Endure 12-Hour is a one-of-a-kind 12-Hour timed event designed by YOU… and tiny colorful balls. Each...
10K Half Marathon Marathon
10
JUN
6

Louisville, CO
• 30.9 miles
$30 -$85
The Colorado 13er is THE event where the best parts of trail running and road racing combine to create a truly enjoyable, kind-to-your-body, well-supported 13.1 race! Seasoned runners and...
5K 10K
4
JUN
6

Denver, CO
• 15.1 miles
$30 -$40
Chip-timed 5K run/walk on the paved trails around Sloan's Lake Park in Denver, CO.
5K
8
JUN
12

Granby, CO
• 60.4 miles
$60 -$160
The Human Potential Running Series Presents:The Summits Trail Runs @ Granby Ranch Resort The Summits Trail Runs occur at Granby Ranch Resort in Colorado's beautiful Rocky Mountains. These...
Half Marathon Marathon 55K
7
FEB
10

Colorado Springs, CO
• 48.1 miles
$85
Join the Journey! Register for 50 States Half Marathon Club "General Membership"! General Membership: $85 to join (then annual dues each year after, currently $35.00 per year). You may save on...
Half Marathon
59
FEB
11

Colorado Springs, CO
• 48.1 miles
$429
Join the Journey! Register for Fifty States Half Marathon Club "Life Membership"! You may save on online processing fees by registering directly at our club website. $429 includes: Joining Fee...
Half Marathon
61
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