Colorado Half Marathon Calendar 2024-2025

Explore the best half marathons in Colorado for 2024-2025! Our updated list features 56 exciting races across the state. Find your next race in Colorado below and join the running community at these great events!

October 2024
Oct
19
Saturday

Mancos Cowboy Half Marathon

5 km 13 mi
Oct
19
Saturday

Blue Sky Trail Marathon

Trail Run 13 mi 26 mi
Oct
27
Sunday

All-Out Kooky-Spooky

5 km 10 km 13 mi
November 2024
Nov
2
Saturday

HRCA Backcountry Wilderness Half Marathon

Trail Run 13 mi
Nov
3
Sunday

Rim Rock Marathon & Half Marathon

13 mi 26 mi
Nov
30
Saturday

Colorado Cold Rush Ultra

Trail Run 10 km 13 mi 50 km
December 2024
Dec
7
Saturday

All-Out Fa La La

5 km 10 km 13 mi
Dec
8
Sunday

Rock Canyon Half Marathon

5 km 13 mi
January 2025
Jan
11
Saturday

Polar Prowl

5 km 10 km 13 mi
Jan
19
Sunday

Arctic Prairie Dog Half Marathon

5 km 10 km 13 mi
February 2025
Feb
9
Sunday

Super Half Marathon

5 km 13 mi
Feb
15-16
Sa - Su

Stories Trail Runs

Trail Run 10 km 13 mi ... 15 hr 30 hr
Feb
16
Sunday

Ralston Creek Half Marathon

5 km 13 mi
Feb
22
Saturday

Mardi Crawl

5 km 10 km 13 mi
March 2025
Mar
1
Saturday

Time to Paddy Half Marathon - Denver

5 km 10 km 13 mi
Mar
2
Sunday

Time to Paddy Half Marathon - Colorado Springs

5 km 10 km 13 mi
Mar
8
Saturday

Run Through Time Trail Marathon

Trail Run 2 mi 13 mi 26 mi
Mar
23
Sunday

All-Out Spring Fever

5 km 10 km 13 mi
April 2025
Apr
11-13
Fr - Su

Desert Rats Trail Running Festival

Trail Run 10 km 21 km 50 km 100 km
Apr
13
Sunday

Horsetooth Half Marathon

13 mi