0033
Half Marathons Found In Colorado in Summer
View all ↓Half Marathons in Colorado in Summer 2025
Find A Race is the US's favourite event listings site. Check out our list of Summer 2025 Half Marathons in Colorado below.
Race Calendar: Half Marathons Found In Summer
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Steamworks Half Marathon
Durango, Colorado
07 Jun 25
$84.74
🚀Boosted
Staunton Rocks! Marathon and Half Marathon
Pine, Colorado
23 Aug 25
$107.00 - $128.20
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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 - 30 Dec 25
Free
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
$44.00 - $75.20
All-Out Summer Breeze
Arvada, Colorado
07 Jun 25
$43.40 - $80.50
Steamworks Half Marathon
Durango, Colorado
07 Jun 25
$84.74
Louise Hammond Memorial Beardance Run
Towaoc, Colorado
07 Jun 25
$22.20 - $43.40
Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing
Windsor, Colorado
21 Jun 25
$16.90 - $128.20
Hometown Half Marathon & 5k/10k - Denver
Westminster, Colorado
21 Jun 25
$20.83 - $65.46
Hometown Half Marathon & 5k/10k - Colorado Springs
Colorado Springs, Colorado
22 Jun 25
$20.83 - $65.46
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
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
$43.40 - $80.50
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
All-Out Runapalooza
Arvada, Colorado
02 Aug 25
$32.80 - $69.90
Hero Hustle Half Marathon Colorado Springs
Colorado Springs, Colorado
02 Aug 25
$13.83 - $54.28
Popsicle 5K/10K/Half - Colorado Springs
Colorado Springs, Colorado
02 Aug 25
$39.10 - $65.20
Sheep Mountain Trail Runs
Fairplay, Colorado
02 Aug 25
$107.00 - $191.80
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
TBK Bank Thirsty 13 Half Marathon
Durango, Colorado
23 Aug 25
$91.10 - $125.55
Arrowhead Half Marathon & 5K
Edwards, Eagle
23 Aug 25
$32.00 - $52.00
Staunton Rocks! Marathon and Half Marathon
Pine, Colorado
23 Aug 25
$107.00 - $128.20
Calarat Challenge Trail Running Festival
Jamestown, Colorado
30 Aug 25 - 31 Aug 25
$17.51 - $86.90
Prairie Dog Run Series
Louisville, Colorado
26 Jan 25 - 27 Sep 25
$900.00
Platte River Half-Marathon and Relay
Littleton, Colorado
13 Apr 25 - 12 Apr 26
$80.50 - $268.75
The Colorado Marathon
Fort Collins, Colorado
04 May 25 - 03 May 26
$32.80 - $379.00
Showing 1-33 of 33 results
