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Half Marathons Found In Colorado in Fall
View all ↓Half Marathons in Colorado in Fall 2025
Find A Race is the US's favourite event listings site. Check out our list of Fall 2025 Half Marathons in Colorado below.
Race Calendar: Half Marathons Found In Fall
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Layafette Music Fest Half-Marathon/10K/5K
Louisville, Colorado
05 Oct 25
$32.80 - $105.94
🚀Boosted
Prairie Dog Run Series
Louisville, Colorado
26 Jan 25 - 27 Sep 25
$900.00
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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
Labor Day Half Marathon
Parker, Colorado
01 Sep 25
$40.88 - $88.40
Black Squirrel Half Marathon
Bellvue, Colorado
06 Sep 25
$107.00
Trail Sisters Women's Half Marathon & 10k
Buena Vista, Colorado
13 Sep 25
$69.90 - $107.00
All-Out Fall Fest
Westminster, Colorado
13 Sep 25
$43.40 - $80.50
National Chocolate Day: Run for Chocolates DENVER/AURORA
Centennial, Colorado
13 Sep 25
$32.80 - $48.70
Hedgehog Dash 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
13 Sep 25
$32.80 - $48.70
Spooky Sprint - Colorado Springs
Colorado Springs, Colorado
13 Sep 25
$20.83 - $65.46
Fall Equinox
Fort Collins, Colorado
14 Sep 25 - 04 Oct 25
$65.65 - $150.73
Spooky Sprint - Denver
Littleton, Colorado
14 Sep 25
$23.98 - $68.64
13th Annual Superhero Event
Greeley, Colorado
20 Sep 25 - 28 Sep 25
Free - $43.40
Autumn Run
Buena Vista, Colorado
20 Sep 25
$33.53 - $92.24
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
Beulah Challenge and OverIt Series
Beulah, Colorado
20 Sep 25
$18.25 - $197.85
Red Feather Trail Jamboree
Red Feather Lakes, Colorado
26 Sep 25 - 28 Sep 25
$107.00 - $316.00
Pioneer Prairie Dog Half, 10k & 5k
Westminster, Colorado
27 Sep 25
Free - $80.00
National Singles Day: Singles & Friends Running DENVER/AURORA
Centennial, Colorado
27 Sep 25
$32.80 - $48.70
National Coffee Day: Run for Coffee DENVER/AURORA
Centennial, Colorado
27 Sep 25
$32.80 - $48.70
WILD Wahatoya Runs
La Veta, Huerfano
27 Sep 25
$50.00 - $100.00
Colorado Springs Marathon, Half, 5K, and Kids K
Colorado Springs, Colorado
04 Oct 25 - 05 Oct 25
Free - $535.35
Cheers to Oktoberfest Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
04 Oct 25
$32.80 - $48.70
Run for Donuts 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
04 Oct 25
$32.80 - $48.70
Layafette Music Fest Half-Marathon/10K/5K
Louisville, Colorado
05 Oct 25
$32.80 - $105.94
Windsor Marathon, Half Marathon, 10k, 5k & 1 Mile Run
Windsor, Colorado
05 Oct 25
$20.00 - $135.00
The Long View Marathon
Fort Collins, Colorado
11 Oct 25
$38.10 - $117.60
Breckenridge Road Marathon
Breckenridge, Colorado
11 Oct 25
$28.06 - $124.46
Westy Half & 5k
Westminster, Colorado
12 Oct 25
$45.00 - $70.00
Mancos Cowboy Half Marathon, 5K, and Fun Run
Mancos, Colorado
18 Oct 25
Free - $69.90
Run Against Breast Cancer 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
18 Oct 25
$32.80 - $48.70
International Sloth Day Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
18 Oct 25
$32.80 - $48.70
Pedal 4 Possible: At the Raceway
Golden, Colorado
18 Oct 25
$54.00 - $128.20
Halloween Trick or Trot Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
01 Nov 25
$32.80 - $48.70
Run DENVER/AURORA "The Mile High City" 5K/10K/13.1 FALL
Centennial, Colorado
01 Nov 25
$32.80 - $48.70
All-Out Kooky-Spooky
Golden, Colorado
02 Nov 25
$43.40 - $80.50
HRCA Backcountry Wilderness Half Marathon
Lone Tree, Colorado
08 Nov 25
$64.85
Veterans Day Freedom Run 5K/10K/13.1 DENVER/AURORA
Centennial, Colorado
15 Nov 25
$32.80 - $48.70
Bed to 5K/10K/13.1 Snoozers Run DENVER/AURORA
Centennial, Colorado
15 Nov 25
$32.80 - $48.70
10k Turkey Trek & 5k Turkey Trot - Now With HALF MARATHON DISTANCE!
Arvada, Colorado
22 Nov 25
$29.00 - $69.00
Showing 1-40 of 46 results
