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Half Marathons Found In Colorado in Summer

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Half Marathons in Colorado in Summer 2026

Find A Race is the US's favourite event listings site. Check out our list of Summer 2026 Half Marathons in Colorado below.

Race Calendar: Half Marathons Found In Summer

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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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All-Out Dog Days

Westminster, Colorado
11 Jul 26
$27.50 - $64.60
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Fifty States Half Marathon Club General Membership

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

Colorado 13er (Half Marathon/10k/5k)

Louisville, Colorado
07 Jun 26
$30.00 - $60.00

All-Out Summer Breeze

Arvada, Colorado
13 Jun 26
$27.50 - $64.60

Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing

Windsor, Colorado
20 Jun 26
$16.90 - $122.90

Race in the Clouds - Alma Dirt Festival 2026

Alma, Colorado
27 Jun 26
$32.80 - $101.70

All-Out Dog Days

Westminster, Colorado
11 Jul 26
$27.50 - $64.60

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, Colorado
18 Jul 26
$30.00 - $65.00
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Erie Half & 5k

Erie, Colorado
16 Aug 26
$33.50 - $59.30

TBK Bank Thirsty 13 Half Marathon

Durango, Colorado
29 Aug 26
$91.10 - $127.14
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