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Half Marathons Found In Colorado in September

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Half Marathons in Colorado in September 2026

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

Race Calendar: Half Marathons Found In September

🚀Boosted

Autumn Run

Buena Vista, Colorado
Sat 19 Sep 26
$33.53 - $97.58
🚀Boosted

Fifty States Half Marathon Club General Membership

Colorado Springs, Colorado
Thu 02 May 24 - Sun 02 Apr 34
$91.10
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Fifty States Half Marathon Club General Membership

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

Colorado Springs Marathon, Half, 5K, and Kids K

Colorado Springs, Colorado
Sat 04 Oct 25 - Sat 03 Oct 26
Free - $535.35

Labor Day Half Marathon

Parker, Colorado
Mon 07 Sep 26
$34.40 - $77.60

All-Out Fall Fest

Westminster, Colorado
Sat 19 Sep 26
$27.50 - $64.60

Pioneer Prairie Dog Half, 10k & 5k

Westminster, Colorado
Sat 26 Sep 26
Free - $65.00

Autumn Run

Buena Vista, Colorado
Sat 19 Sep 26
$33.53 - $97.58
Showing 1-6 of 6 results