Colorado Half Marathon Calendar 2025-2026

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Explore the best half marathons in Colorado for 2025-2026! Our updated list features 103 exciting races across the region. Find your next race in Colorado below and join the running community at these great events!

December 2025
Dec
7
Sunday

Rock Canyon Half Marathon

5 km 13 mi
January 2026
Jan
10
Saturday

Polar Prowl

5 km 10 km 13 mi
February 2026
Feb
21-22
Sa - Su

Stories Trail Runs

Trail Run 10 km 13 mi ... 15 hr 30 hr
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