Race Discovery

Half-Marathon races in Colorado, United States — 2026 trail running calendar

8 events found

Trail Sisters Women's Half Marathon & 10k logo
Sep
12

Trail Sisters Women's Half Marathon & 10k

Buena Vista, Colorado, United States
$65.00 - $100.00
Trail running
Half-Marathon 10K
Red Feather Trail Jamboree logo
Sep
25

Red Feather Trail Jamboree

Red Feather Lakes, Colorado, United States
$110.00 - $340.00
Trail running
Ultra Half-Marathon
HRCA Backcountry Wilderness Half Marathon logo
Nov
07

HRCA Backcountry Wilderness Half Marathon

Lone Tree, Colorado, United States
$70.00
Trail running
Half-Marathon
Stories Trail Runs logo
Feb
06

Stories Trail Runs

Colorado Springs, Colorado, United States
$60.00 - $100.00
Trail running Running
10.8K Half-Marathon 31.5K
22nd Annual Run Through Time Trail Marathon and Half Marathon logo
Mar
13

22nd Annual Run Through Time Trail Marathon and Half Marathon

Salida, Colorado, United States
Trail running Running
Marathon Half-Marathon 3.2K
Race in the Clouds - Alma Dirt Festival logo
Jun
24

Race in the Clouds - Alma Dirt Festival

Alma, Colorado, United States
Free - $90.00
Running Mountain biking Duathlon Trail running
Weekend Camping FREE Kids Mountain Bike and Trail Run Ultra Marathon +7
Farish Trail Race logo
May
23

Farish Trail Race

Woodland Park, Colorado, United States
Trail running
Half-Marathon 10K 5K 1.6K
Valkyrie Trail Race
May
09

Valkyrie Trail Race

Colorado Springs, Colorado, United States
Trail running
49.6K Marathon 28K Half-Marathon +2