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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

πŸš€Boosted

Spooky Sprint - Denver

Littleton, Colorado
14 Sep 25
$18.83 - $48.28
πŸš€Boosted

Erie Half & 5k

Erie, Colorado
17 Aug 25
$45.00 - $70.00
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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

Slacker Half Marathon-Relay-4-Mile Races

Georgetown, Colorado
01 Jan 25 - 28 Jun 25
$38.10 - $128.20

2025 Team CKF Running Series

Aspen, Colorado
22 Feb 25 - 25 Oct 25
Free

Fleet Feet Denver Spring Half Marathon Twelve-Week Training Program

Littleton, Colorado
25 Feb 25 - 18 May 25
$160.15

Platte River Half-Marathon and Relay

Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75

All-Out Beat the Heat

Westminster, Colorado
19 Apr 25
$48.70 - $85.80

Great Western Trail Race

Severance, Colorado
19 Apr 25
$16.90 - $85.80

Runs With Scissors Races

Brighton, Colorado
26 Apr 25
$38.10 - $102.76

Bigfoot Half Marathon

Estes Park, Colorado
26 Apr 25
$70.80 - $156.40

The Colorado Marathon

Fort Collins, Colorado
04 May 25
$54.00 - $379.00

Longmont Half & 5k (LM Half)

Longmont, Colorado
04 May 25
$55.00 - $80.00

DoNot Stop Half Marathon (5k/10k) - Denver

Littleton, Colorado
10 May 25
$18.83 - $63.34

Donot Stop Half Marathon (5k/10k) - Colorado Springs

Colorado Springs, Colorado
11 May 25
$18.83 - $63.34

Endure Trail Runs

Divide, Colorado
17 May 25 - 18 May 25
$85.80 - $202.40

2.2 for 22q Walk/Run/Ride 2025

Anywhere, Colorado
31 May 25 - 08 Jun 25
$24.32

Colorado 13er (Half Marathon/10k/5k)

Louisville, Colorado
01 Jun 25
$39.00 - $69.90

All-Out Summer Breeze

Arvada, Colorado
07 Jun 25
$43.40 - $80.50

Steamworks Half Marathon

Durango, Colorado
07 Jun 25
$84.74

Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing

Windsor, Colorado
21 Jun 25
$16.90 - $122.90

Hometown Half Marathon & 5k/10k - Denver

Westminster, Colorado
21 Jun 25
$18.83 - $54.28

Hometown Half Marathon & 5k/10k - Colorado Springs

Colorado Springs, Colorado
22 Jun 25
$18.83 - $54.28

The Alma Foundation Race in the Clouds Dirt Festival

Alma, Colorado
10 Jul 25 - 13 Jul 25
Free - $133.50

All-Out Dog Days

Westminster, Colorado
12 Jul 25
$32.80 - $69.90

Summer Splash Prairie Dog Half, 10k, & 5k

Castle Rock, Colorado
19 Jul 25
$40.00 - $80.00

Aspen Valley Marathon

Aspen, Colorado
19 Jul 25
$75.45 - $234.45

Rocky Mountain Half Marathon & 5K

Estes Park, Colorado
01 Aug 25 - 02 Aug 25
Free - $234.20

Sheep Mountain Trail Runs

Fairplay, Colorado
02 Aug 25
$96.40 - $181.20

All-Out Runapalooza

Arvada, Colorado
02 Aug 25
$32.80 - $69.90

Hero Hustle Colorado Springs

Colorado Springs, Colorado
02 Aug 25
$13.83 - $54.28

Bound for Boston Marathon & Half Marathon - Denver

Denver, Colorado
03 Aug 25
$49.10 - $102.70

Erie Half & 5k

Erie, Colorado
17 Aug 25
$45.00 - $70.00

Byers Peak Stampede Half Marathon & 5K Run

Fraser, Colorado
23 Aug 25
$54.00 - $75.20

Arrowhead Half Marathon & 5K

Edwards, Eagle
23 Aug 25
$32.00 - $52.00

TBK Bank Thirsty 13 Half Marathon

Durango, Colorado
23 Aug 25
$91.10 - $125.55

Staunton Rocks! Marathon and Half Marathon

Pine, Colorado
23 Aug 25
$107.00 - $128.20

Labor Day Half Marathon

Parker, Colorado
01 Sep 25
$34.40 - $77.60

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
$32.80 - $69.90
Showing 1-40 of 68 results
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