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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
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 - 27 Jun 25
$38.10 - $80.50
2025 Team CKF Running Series
Aspen, Colorado
22 Feb 25 - 25 Oct 25
Free
Colorado 13er (Half Marathon/10k/5k)
Louisville, Colorado
01 Jun 25
$33.50 - $64.60
All-Out Summer Breeze
Arvada, Colorado
07 Jun 25
$32.80 - $69.90
Red, White and Brew 5k, 10k, Half Marathon & 12 Hour Last Person Standing
Windsor, Colorado
21 Jun 25
$16.90 - $101.70
Hometown Half Marathon & 5k/10k - Denver
Westminster, Colorado
21 Jun 25
$18.83 - $48.28
Hometown Half Marathon & 5k/10k - Colorado Springs
Colorado Springs, Colorado
22 Jun 25
$18.83 - $48.28
The Alma Foundation Race in the Clouds Dirt Festival
Alma, Colorado
10 Jul 25 - 13 Jul 25
Free - $69.90
All-Out Dog Days
Westminster, Colorado
12 Jul 25
$27.50 - $64.60
Aspen Valley Marathon
Aspen, Colorado
19 Jul 25
Summer Splash Prairie Dog Half, 10k, & 5k
Castle Rock, Colorado
19 Jul 25
$40.00 - $80.00
Rocky Mountain Half Marathon & 5K
Estes Park, Colorado
01 Aug 25 - 02 Aug 25
Free - $193.47
All-Out Runapalooza
Arvada, Colorado
02 Aug 25
$27.50 - $64.60
Sheep Mountain Trail Runs
Fairplay, Colorado
02 Aug 25
$96.40 - $181.20
Bound for Boston Marathon & Half Marathon - Denver
Denver, Colorado
03 Aug 25
$49.10 - $102.70
Erie Half & 5k
Erie, Colorado
17 Aug 25
$40.00 - $65.00
Staunton Rocks! Marathon and Half Marathon
Pine, Colorado
23 Aug 25
$96.40 - $117.60
Prairie Dog Run Series
Louisville, Colorado
26 Jan 25 - 27 Sep 25
$900.00
Steamworks Half Marathon
Durango, Colorado
07 Jun 25
$84.74
TBK Bank Thirsty 13 Half Marathon
Durango, Colorado
23 Aug 25
$91.10 - $125.02
Showing 1-21 of 21 results