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Marathons Found In Colorado
View all ↓Marathons in Colorado 2025 - 2026
The most comprehensive list of Marathons in and near Colorado in 2025 - 2026. Find your perfect race!
Looking for more races to choose from? If you're in Colorado and want to take on a marathon challenge in neighboring states, look no further. Discover our calendars of:
You can also browse our comprehensive list of Marathons in the USA to find your next great challenge, or take a look at our calendar of half marathon races.
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Race Calendar: Marathons Found In Colorado
Slacker Half Marathon-Relay-4-Mile Races
Georgetown, Colorado
01 Jan 25 - 27 Jun 25
$38.10 - $112.30
The Sloth Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
22 Feb 25
$32.80 - $48.70
Muffin Marathon 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
22 Feb 25
$32.80 - $48.70
St. Paddy's Day Lucky Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
15 Mar 25
$32.80 - $52.94
Arbor Day Run Green 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
15 Mar 25
$32.80 - $52.94
Run DENVER/AURORA "The Mile High City" 5K/10K/13.1 Race
Centennial, Colorado
29 Mar 25
$32.80 - $48.70
Fox Trot Race 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
29 Mar 25
$32.80 - $48.70
Platte River Half-Marathon and Relay
Littleton, Colorado
13 Apr 25
$107.00 - $228.90
Always Hope Easter Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
19 Apr 25
$32.80 - $48.70
Earth Day: Run GREEN 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
19 Apr 25
$32.80 - $48.70
Sloth Runners Race 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
03 May 25
$32.80 - $48.70
Cinco De Mayo Run: Against All Odds DENVER/AURORA
Centennial, Colorado
03 May 25
$32.80 - $48.70
Father's Day Fun Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
14 Jun 25
$32.80 - $48.70
Run for Donuts 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
14 Jun 25
$32.80 - $48.70
July 4th Freedom Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
05 Jul 25
$32.80 - $48.70
SuperHeroes Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
05 Jul 25
$32.80 - $48.70
Run for Wine & Cheese 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
02 Aug 25
$32.80 - $48.70
Singles & Friends Running Club 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
02 Aug 25
$32.80 - $48.70
Sunrise Marathon 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
30 Aug 25
$32.80 - $48.70
Labor Day Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
30 Aug 25
$32.80 - $48.70
Beulah Challenge and OverIt Series
Beulah, Colorado
20 Sep 25
$18.25 - $187.25
Layafette Music Fest Half-Marathon/10K/5K
Louisville, Colorado
05 Oct 25
$32.80 - $105.94
Showing 1-22 of 22 results