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Marathons Found In Colorado in April

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Marathons in Colorado in April 2026

Find A Race is the US's favourite event listings site. Check out our list of April 2026 Marathons in Colorado below.

Race Calendar: Marathons Found In April

🚀Boosted

Platte River Half-Marathon and Relay

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

Platte River Half-Marathon and Relay

Littleton, Colorado
12 Apr 26
$75.20 - $165.30
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Platte River Half-Marathon and Relay

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

Platte River Half-Marathon and Relay

Littleton, Colorado
12 Apr 26
$75.20 - $165.30
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