Colorado close

Colorado Half Marathon Calendar 2025-2026

Header image

Explore the best half marathons in Colorado for 2025-2026! Our updated list features 95 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

February 2026
Feb
28
Saturday

Bodies Race Company - City Park West

5 km 10 km 13 mi
March 2026
Mar
1
Sunday

That Dam Run Half Marathon

5 km 10 km 13 mi
Mar
1
Sunday

Bodies Race Company - Colorado Springs

5 km 10 km 13 mi
Mar
7
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Mar
14
Saturday

Run Through Time Trail Marathon

Trail Run 2 mi Half Marathon Marathon
Mar
14
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Mar
22
Sunday

All-Out Spring Fever

5 km 10 km Half Marathon
April 2026
Apr
4
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Apr
10-12
Fr - Su

Desert Rats Trail Running Festival

Trail Run 9 km Half Marathon 48 km 100 km
Apr
11
Saturday

Boulder Rez Half

5 km 10 km Half Marathon
Apr
12
Sunday

Platte River Half-Marathon

Half Marathon
Apr
12
Sunday

Spring Fling Prairie Dog Half Marathon

5 km 10 km 13 mi
Apr
18
Saturday

All-Out Beat the Heat

5 km 10 km Half Marathon
Apr
18
Saturday

Great Western Trail Race

Trail Run 5 km 10 km Half Marathon
Apr
18
Saturday

Mountain Ridge Trail Race

Trail Run 5 km 10 km 13 mi 22 mi
Apr
19
Sunday

Horsetooth Half Marathon

Half Marathon
Apr
19
Sunday

DoNot Stop Half Marathon - Denver

5 km 10 km Half Marathon
Apr
25
Saturday

Runs With Scissors Races

Half Marathon Marathon 50 km
Apr
25
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
May 2026
May
2
Saturday

The Best Races - Centennial

5 km 10 km 13 mi
Articles
Top 10 Marathons in the Netherlands - The Ultimate Dutch Marathon Bucket List: 10 Unmissable Races
The Beauty of the Easy Run - Why slowing down might be the smartest thing you do for your running
Mizuno Wave Rider 28: Elevating the Legacy of a Running Icon
Garmin Forerunner Review: Garmin Forerunner Series