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Half Marathons Found In Colorado

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Half Marathons in Colorado 2025 - 2026

The most comprehensive list of Half Marathons in and near Colorado in 2025 - 2026. Find your perfect race!

Ready to take on a new challenge? If you're in Colorado and seeking half marathon races in neighboring states, look no further. Discover our calendars of:

Find your next great goal to chase at findarace, and choose from an extensive list of runs, swims, and cycles all over the US.

Race Calendar: Half Marathons Found In Colorado

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50 States Half Marathon Club Life Membership

Colorado Springs, Colorado
26 Apr 31
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Denver, CO Galloway Training Program

Denver, Colorado
20 Apr 24 - 05 Nov 25
$91.10 - $274.00
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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

Fleet Feet Denver Fall Half-Marathon Twelve-Week Training Program

Littleton, Colorado
08 Jul 25 - 28 Sep 25
$155.00

Boulderthon Half Marathon Training Program

Boulder, Colorado
09 Jul 25 - 28 Sep 25
$150.00

Rocky Mountain Half Marathon & 5K

Estes Park, Colorado
01 Aug 25 - 02 Aug 25
Free - $268.75

Hero Hustle Half Marathon Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$13.83 - $71.82

Popsicle 5K/10K/Half - Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$39.10 - $65.20

Run for Coffee Lovers 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
02 Aug 25
$32.80 - $48.70

All-Out Runapalooza

Arvada, Colorado
02 Aug 25
$43.40 - $80.50

Singles & Friends Running Club 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
02 Aug 25
$32.80 - $48.70

Bound for Boston Marathon & Half Marathon - Denver

Denver, Colorado
03 Aug 25
$49.10 - $102.70

Choice City Running Festival

Fort Collins, Colorado
08 Aug 25
Free - $81.63

Erie Half & 5k

Erie, Colorado
17 Aug 25
$45.00 - $70.00

Staunton Rocks! Marathon and Half Marathon

Pine, Colorado
23 Aug 25
$117.60 - $138.80

Byers Peak Stampede Half Marathon & 5K Run

Fraser, Colorado
23 Aug 25
$64.60 - $85.80

Arrowhead Half Marathon & 5K

Edwards, Eagle
23 Aug 25
$32.00 - $52.00

TBK Bank Thirsty 13 Half Marathon

Durango, Colorado
23 Aug 25
$116.54 - $151.52

Calarat Challenge Trail Running Festival

Jamestown, Colorado
30 Aug 25 - 31 Aug 25
$22.85 - $102.91

Labor Day Run 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
30 Aug 25
$32.80 - $48.70

Sunrise Marathon 5K/10K/13.1 DENVER/AURORA

Centennial, Colorado
30 Aug 25
$32.80 - $48.70

Labor Day Half Marathon

Parker, Colorado
01 Sep 25
$37.64 - $83.00

Black Squirrel Half Marathon

Bellvue, Colorado
06 Sep 25
$107.00

National Chocolate Day: Run for Chocolates DENVER/AURORA

Centennial, Colorado
13 Sep 25
$32.80 - $48.70

All-Out Fall Fest

Westminster, Colorado
13 Sep 25
$43.40 - $80.50

Trail Sisters Women's Half Marathon & 10k

Buena Vista, Colorado
13 Sep 25
$69.90 - $107.00

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 - $59.10

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 - $60.16

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 - $187.25

Red Feather Trail Jamboree

Red Feather Lakes, Colorado
26 Sep 25 - 28 Sep 25
$107.00 - $316.00

WILD Wahatoya Runs

La Veta, Huerfano
27 Sep 25
$50.00 - $100.00

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

Pioneer Prairie Dog Half, 10k & 5k

Westminster, Colorado
27 Sep 25
Free - $80.00

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

Colorado Springs, Colorado
04 Oct 25 - 05 Oct 25
Free - $535.35
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