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Marathons Found In Colorado in August

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Marathons in Colorado in August 2025

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

Race Calendar: Marathons Found In August

🚀Boosted

Labor Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
30 Aug 25
$32.80 - $48.70
🚀Boosted

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
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Fleet Feet Denver Fall Half-Marathon Twelve-Week Training Program

Littleton, Colorado
08 Jul 25 - 28 Sep 25
$155.00

Singles & Friends Running Club 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
02 Aug 25
$32.80 - $48.70

Run for Wine & Cheese 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
02 Aug 25
$32.80 - $48.70

Labor Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
30 Aug 25
$32.80 - $48.70

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
30 Aug 25
$32.80 - $48.70

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
Showing 1-6 of 6 results