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Idaho Half Marathon Calendar 2025-2026

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Explore the best half marathons in Idaho for 2025-2026! Our updated list features 21 exciting races across the region. Find your next race in Idaho below and join the running community at these great events!

April 2026
Apr
18
Sa

Race to Robie Creek

Half Marathon
Apr
25
Sa

Spring Dash

5 km 10 km Half Marathon
May 2026
May
2
Sa

Boise River Marathon

5 km 10 km Half Marathon Marathon
May
9
Sa

Long Bridge Half-Marathon

5 km 10 km Half Marathon
May
16
Sa

YMCA Famous Idaho Potato Marathon

5 km 10 km Half Marathon Marathon
May
23
Sa

Redfish Lake Lodge Memorial Weekend Run

5 km 10 km Half Marathon
May
24
Su

CDA Marathon

5 km 10 km Half Marathon Marathon
June 2026
Jun
6
Sa

Teton Dam Marathon

5 km 10 km 13 mi 26 mi
Jun
6
Sa

Spirit of Magic Valley Half Marathon

5 km 10 km 13 mi
Jun
20-21
Sa - Su

Race The Wolf

Trail Run 5 mi Half Marathon Marathon
Jun
20
Sa

Boise Marathon

5 km 10 km Half Marathon Marathon
July 2026
Jul
18
Sa

Mesa Falls Marathon

5 km 10 km Half Marathon Marathon
Jul
25
Sa

Idaho Falls Marathon

5 km 13 mi 26 mi
August 2026
Aug
8-9
Sa - Su

Boise Spartan Trifecta Weekend

Obstacle Run 5 km 10 km Half Marathon 4 hr
September 2026
Sep
5
Sa

Pocatello Marathon

3 mi 6 mi 13 mi 26 mi
Sep
5
Sa

Salmon Marathon

Half Marathon Marathon
Sep
19
Sa

Priest Lake Marathon

10 km Half Marathon Marathon 50 km
October 2026
Oct
3
Sa

Legends Never Die

Trail Run 13 mi 34 mi
Oct
4
Su

Moscow Mountain Madness

Trail Run 5 mi 13 mi 50 km
Oct
10
Sa

Hayden Lake Marathon

5 km 7 mi 13 mi 26 mi