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Half Marathons Found In Colorado in May

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Half Marathons in Colorado in May 2025

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

Race Calendar: Half Marathons Found In May

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Fifty States Half Marathon Club General Membership

Colorado Springs, Colorado
02 May 24 - 02 Apr 34
$91.10
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Donot Stop Half Marathon (5k/10k) - Colorado Springs

Colorado Springs, Colorado
11 May 25
$18.83 - $71.82
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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

Slacker Half Marathon-Relay-4-Mile Races

Georgetown, Colorado
01 Jan 25 - 28 Jun 25
$38.10 - $128.20

2025 Team CKF Running Series

Aspen, Colorado
22 Feb 25 - 30 Dec 25
Free

Fleet Feet Denver Spring Half Marathon Twelve-Week Training Program

Littleton, Colorado
25 Feb 25 - 18 May 25
$160.15

The Colorado Marathon

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

Longmont Half & 5k (LM Half)

Longmont, Colorado
04 May 25
$60.00 - $85.00

DoNot Stop Half Marathon (5k/10k) - Denver

Littleton, Colorado
10 May 25
$18.83 - $71.82

Donot Stop Half Marathon (5k/10k) - Colorado Springs

Colorado Springs, Colorado
11 May 25
$18.83 - $71.82

Endure Trail Runs

Divide, Colorado
17 May 25 - 18 May 25
$85.80 - $202.40

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 1-12 of 12 results