Idaho Half Marathon Calendar 2025-2026

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Explore the best half marathons in Idaho for 2025-2026! Our updated list features 25 exciting races across the region. Find your next race in Idaho below and join the running community at these great events!

October 2025
Oct
4
Saturday

Jackass Half Marathon

5 km 13 mi
Oct
5
Sunday

Moscow Mountain Madness

Trail Run 5 mi 13 mi 50 km
Oct
11
Saturday

City of Trees Marathon

5 km 10 km 13 mi 26 mi
Oct
11
Saturday

Hayden Lake Marathon

5 km 6 mi 13 mi 26 mi
Oct
18
Saturday

Idaho Running Day

5 km 10 km 13 mi 26 mi
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