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Colorado Half Marathon Calendar 2026-2027

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Monthly updates for Colorado

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

Explore the best half marathons in Colorado for 2026-2027! Our updated list features 102 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

January 2026
Jan
10
Sa

Polar Prowl

5 km 10 km Half Marathon
Jan
17
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Jan
24
Sa

Chilly Willy Half Marathon-Colorado Springs

5 km 10 km Half Marathon
February 2026
Feb
7
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Feb
8
Su

Super Half Marathon

5 km Half Marathon
Feb
14
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Feb
15
Su

Ralston Creek Half Marathon

5 km Half Marathon
Feb
21-22
Sa - Su

Stories Trail Runs

Trail Run 10 km Half Marathon ... 6 hr 15 hr
Feb
22
Su

Mardi Crawl

5 km 10 km Half Marathon
March 2026
Mar
1
Su

That Dam Run Half Marathon

5 km 10 km 13 mi
Mar
7
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Mar
14
Sa

Run Through Time Trail Marathon

Trail Run 2 mi 13 mi 26 mi
Mar
14
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Mar
14
Sa

Lucky Brew Race 15K

5 km 10 km 15 km Half Marathon
Mar
22
Su

All-Out Spring Fever

5 km 10 km Half Marathon
Mar
29
Su

Spring Equinox

5 km 13 mi
April 2026
Apr
4
Sa

The Best Races - Centennial

5 km 10 km 13 mi
Apr
5
Su

Three Creeks Half Marathon

13 mi
Apr
9-12
Th - Su

Desert Rats Trail Running Festival

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

Mountain Ridge Trail Race

Trail Run 3 mi 6 mi 13 mi 22 mi