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Half Marathons Found In Colorado in September
View all ↓Half Marathons in Colorado in September 2025
Find A Race is the US's favourite event listings site. Check out our list of September 2025 Half Marathons in Colorado below.
Race Calendar: Half Marathons Found In September
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 - 25 Oct 25
Free
Labor Day Half Marathon
Parker, Colorado
01 Sep 25
$34.40 - $77.60
All-Out Fall Fest
Westminster, Colorado
13 Sep 25
$27.50 - $64.60
Spooky Sprint - Colorado Springs
Colorado Springs, Colorado
13 Sep 25
$18.83 - $44.28
Spooky Sprint - Denver
Denver, Colorado
14 Sep 25
$18.83 - $44.28
Pioneer Prairie Dog Half, 10k & 5k
Westminster, Colorado
27 Sep 25
Free - $75.00
Prairie Dog Run Series
Louisville, Colorado
12 Jan 25 - 27 Sep 25
$900.00
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