Colorado close

Colorado Half Marathon Calendar 2026-2027

Header image

Explore the best half marathons in Colorado for 2026-2027! Our updated list features 113 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

Half Marathon Calendar United States
August 2026
Aug
23
Su

Pioneer Prairie Dog Half

5 km 10 km 13 mi
Aug
29
Sa

Thirsty 13 Half Marathon

13 mi
Aug
29
Sa

The Best Races - Foxfield

5 km 10 km 13 mi
The Best Races - Foxfield
September 2026
Sep
4
Fr

Colorado Springs Sunrise Wish Run

5 km 10 km Half Marathon 50 km
Sep
5
Sa

Bodies Race Company - Broomfield

3 mi 6 mi 13 mi
Monthly updates for Colorado

Get new running races (and updates) in your inbox every month.
Sep
6
Su

Bodies Race Company - Colorado Springs

3 mi 6 mi 13 mi
Sep
6
Su

Wheat Ridge Half Marathon

5 km 13 mi
Sep
7
Mo

Labor Day Half Marathon

5 km 10 km 13 mi
Sep
11-12
Fr - Sa

American Heroes Run

Trail Run 5 km 9 mi ... 551 min 100 mi
Sep
12
Sa

Ned Ned Run

Race Roster Road Race Trail Run 5 km 6 mi 13 mi
Ned Ned Run
Sep
12
Sa

Snow Mountain Ranch

Trail Run 5 km 10 km ... 33 km 50 km
Sep
12
Sa

Trail Sisters Women's Half Marathon

Trail Run 10 km 13 mi
Sep
12
Sa

The Best Races - Foxfield

Race Roster 5 km 10 km 13 mi
The Best Races - Foxfield
Sep
12
Sa

Steele Trap Trail Run

Trail Run 13 mi 26 mi 50 mi
Sep
12
Sa

The 80s Run

5 km 10 km Half Marathon
Sep
13
Su

Nun Run

5 km Half Marathon
Sep
19
Sa

Ouray Mountain Trail Run

Trail Run 13 mi
Sep
19
Sa

All-Out Fall Fest

5 km 10 km 13 mi
Sep
19
Sa

Run the Rockies Road Half Marathon

10 km 13 mi
Sep
19
Sa

Autumn Run - Buena Vista, CO

3 mi 6 mi 13 mi
Add Event
Help us complete the calendar!
  • Distance is at least 5 km
  • Event has a website or Facebook page
Website
Optional: Please provide your e-mail address if we may contact you.
Report a change
We will only update the data if the information is also on the website.