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Marathons Found In Colorado in May

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Marathons in Colorado in May 2025

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

Race Calendar: Marathons Found In May

🚀Boosted

Slacker Half Marathon-Relay-4-Mile Races

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

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

Centennial, Colorado
03 May 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

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
Showing 1-3 of 3 results