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Marathons Found In Colorado in Spring

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Marathons in Colorado in Spring 2025

Find A Race is the US's favourite event listings site. Check out our list of Spring 2025 Marathons in Colorado below.

Race Calendar: Marathons Found In Spring

🚀Boosted

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
🚀Boosted

Slacker Half Marathon-Relay-4-Mile Races

Georgetown, Colorado
01 Jan 25 - 28 Jun 25
$38.10 - $128.20
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Slacker Half Marathon-Relay-4-Mile Races

Georgetown, Colorado
01 Jan 25 - 28 Jun 25
$38.10 - $128.20

Sloth Runners Race 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
03 May 25
$32.80 - $52.94

Cinco De Mayo Run: Against All Odds DENVER/AURORA

Centennial, Colorado
03 May 25
$32.80 - $52.94

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
Showing 1-4 of 4 results