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Idaho Half Marathon Calendar 2026-2027

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Monthly updates for Idaho

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Explore the best half marathons in Idaho for 2026-2027! Our updated list features 32 exciting races across the region. Find your next race in Idaho below and join the running community at these great events!

March 2026
Mar
14
Sa

St. Patrick's Fun Run & Walk

5 km 8 km Half Marathon
Mar
21
Sa

Undergrad Spring

3 mi 13 mi 26 mi
April 2026
Apr
25
Sa

Spring Dash

5 km 10 km Half Marathon
Apr
25
Sa

Falls2Falls

5 km 5 mi 13 mi
May 2026
May
2
Sa

Boise River Marathon

5 km 10 km 13 mi 26 mi
May
9
Sa

Long Bridge Half-Marathon

5 km 10 km Half Marathon
May
9
Sa

Over The Top Trail Race - Pocatello, ID

Trail Run 5 km 10 km Half Marathon 30 km
May
16
Sa

YMCA Famous Idaho Potato Marathon

5 km 10 km Half Marathon Marathon
May
23
Sa

CDA Marathon

5 km 10 km Half Marathon Marathon
May
23
Sa

Redfish Lake Lodge Memorial Weekend Run

5 km 10 km Half 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
13
Sa

Dirty Dog Trail Marathon and Half Marathon

Trail Run Half Marathon Marathon
Jun
20-21
Sa - Su

Race The Wolf

Trail Run 5 mi 13 mi 26 mi
Jun
20
Sa

Boise Marathon

5 km 10 km 13 mi 26 mi
July 2026
Jul
11
Sa

Christmas Half Marathon in July - Boise

5 km 10 km Half Marathon
Jul
18
Sa

Mesa Falls Marathon

13 mi 26 mi
Jul
25
Sa

Idaho Falls Marathon

5 km Half Marathon Marathon
August 2026
Aug
8-9
Sa - Su

Boise Spartan Trifecta Weekend

Obstacle Run 5 km 10 km Half Marathon
Aug
8
Sa

Outlaw Trail Ultra Half Marathon

Trail Run Half Marathon