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Marathons Found In Colorado in April

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Marathons in Colorado in April 2025

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

Race Calendar: Marathons Found In April

🚀Boosted

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25
$117.60 - $250.10
🚀Boosted

Earth Day: Run GREEN 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
19 Apr 25
$32.80 - $52.94
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Slacker Half Marathon-Relay-4-Mile Races

Georgetown, Colorado
01 Jan 25 - 28 Jun 25
$2.06 - $128.20

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25
$117.60 - $250.10

Always Hope Easter Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
19 Apr 25
$32.80 - $52.94

Earth Day: Run GREEN 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
19 Apr 25
$32.80 - $52.94
Showing 1-4 of 4 results