Half Marathons in Colorado in August 2025

Fifty States Half Marathon Club General Membership

Colorado Springs, Colorado

02 May 24 - 02 Apr 34

$91.10

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2025 Team CKF Running Series

Aspen, Colorado

22 Feb 25 - 25 Oct 25

Free

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Rocky Mountain Half Marathon & 5K

Estes Park, Colorado

01 Aug 25 - 02 Aug 25

Free - $193.47

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All-Out Runapalooza

Arvada, Colorado

02 Aug 25

$27.50 - $64.60

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Sheep Mountain Trail Runs

Fairplay, Colorado

02 Aug 25

$96.40 - $181.20

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Bound for Boston Marathon & Half Marathon - Denver

Denver, Colorado

03 Aug 25

$28.60 - $81.50

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Erie Half & 5k

Erie, Colorado

17 Aug 25

$35.00 - $60.00

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Staunton Rocks! Marathon and Half Marathon

Pine, Colorado

23 Aug 25

$96.40 - $117.60

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Prairie Dog Run Series

Louisville, Colorado

12 Jan 25 - 27 Sep 25

$900.00

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