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Half Marathons Found In Colorado in October
View all ↓Half Marathons in Colorado in October 2025
Find A Race is the US's favourite event listings site. Check out our list of October 2025 Half Marathons in Colorado below.
Race Calendar: Half Marathons Found In October
πBoosted
Westy Half & 5k
Westminster, Colorado
12 Oct 25
$40.00 - $65.00
πBoosted
Breckenridge Road Marathon
Breckenridge, Colorado
11 Oct 25
$20.12 - $110.85
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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
2025 Team CKF Running Series
Aspen, Colorado
22 Feb 25 - 30 Dec 25
Free
Fall Equinox
Fort Collins, Colorado
14 Sep 25 - 04 Oct 25
$65.65 - $140.03
Rim to Rim Royal Gorge Races: 5K Road Run, Trail 8 Mile, Trail Half Marathon
Canon City, Colorado
20 Sep 25 - 07 Dec 25
Free - $186.50
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, Colorado
04 Oct 25 - 05 Oct 25
Free - $535.35
Layafette Music Fest Half-Marathon/10K/5K
Louisville, Colorado
05 Oct 25
$32.80 - $105.94
Windsor Marathon, Half Marathon, 10k & 5k
Windsor, Colorado
05 Oct 25
$15.00 - $125.00
Breckenridge Road Marathon
Breckenridge, Colorado
11 Oct 25
$20.12 - $110.85
The Long View Marathon
Fort Collins, Colorado
11 Oct 25
$38.10 - $107.00
Westy Half & 5k
Westminster, Colorado
12 Oct 25
$40.00 - $65.00
Blue Sky Trail Marathon & Half Marathon
Fort Collins, Colorado
18 Oct 25 - 19 Oct 25
$107.00 - $128.20
Platte River Half-Marathon and Relay
Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
Showing 1-13 of 13 results