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Half Marathons Found In Colorado in August

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Half Marathons in Colorado in August 2025

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

Race Calendar: Half Marathons Found In August

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Hero Hustle Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$18.83 - $48.28
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Byers Peak Stampede Half Marathon & 5K Run

Fraser, Colorado
23 Aug 25
$54.00 - $75.20
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Fifty States Half Marathon Club General Membership

Colorado Springs, Colorado
02 May 24 - 02 Apr 34
$91.10

2025 Team CKF Running Series

Aspen, Colorado
22 Feb 25 - 25 Oct 25
Free

Rocky Mountain Half Marathon & 5K

Estes Park, Colorado
01 Aug 25 - 02 Aug 25
Free - $234.20

All-Out Runapalooza

Arvada, Colorado
02 Aug 25
$32.80 - $69.90

Hero Hustle Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$18.83 - $48.28

Sheep Mountain Trail Runs

Fairplay, Colorado
02 Aug 25
$96.40 - $181.20

Bound for Boston Marathon & Half Marathon - Denver

Denver, Colorado
03 Aug 25
$49.10 - $102.70

Erie Half & 5k

Erie, Colorado
17 Aug 25
$40.00 - $65.00

Arrowhead Half Marathon & 5K

Edwards, Eagle
23 Aug 25
$32.00 - $52.00

Byers Peak Stampede Half Marathon & 5K Run

Fraser, Colorado
23 Aug 25
$54.00 - $75.20

Staunton Rocks! Marathon and Half Marathon

Pine, Colorado
23 Aug 25
$107.00 - $128.20

TBK Bank Thirsty 13 Half Marathon

Durango, Colorado
23 Aug 25
$91.10 - $125.55

Prairie Dog Run Series

Louisville, Colorado
26 Jan 25 - 27 Sep 25
$900.00
Showing 1-13 of 13 results