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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
$13.83 - $54.28
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The Colorado Marathon

Fort Collins, Colorado
04 May 25 - 03 May 26
$32.80 - $379.00
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Denver, CO Galloway Training Program

Denver, Colorado
20 Apr 24 - 05 Nov 25
$91.10 - $274.00

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 - 30 Dec 25
Free

The Colorado Marathon

Fort Collins, Colorado
04 May 25 - 03 May 26
$32.80 - $379.00

Fleet Feet Denver Fall Half-Marathon Twelve-Week Training Program

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

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

Sheep Mountain Trail Runs

Fairplay, Colorado
02 Aug 25
$96.40 - $181.20

Hero Hustle Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$13.83 - $54.28

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$39.10 - $65.20

Bound for Boston Marathon & Half Marathon - Denver

Denver, Colorado
03 Aug 25
$49.10 - $102.70

Erie Half & 5k

Erie, Colorado
17 Aug 25
$45.00 - $70.00

Byers Peak Stampede Half Marathon & 5K Run

Fraser, Colorado
23 Aug 25
$54.00 - $75.20

Arrowhead Half Marathon & 5K

Edwards, Eagle
23 Aug 25
$32.00 - $52.00

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

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
Showing 1-18 of 18 results