Idaho close

Idaho Marathon Calendar 2026-2027

Header image
Monthly updates for Idaho

Get new running races (and updates) in your inbox every month.

Explore the best marathons in Idaho for 2026-2027! Our updated list features 17 exciting races across the region. Find your next race in Idaho below and join the running community at these great events!

March 2026
Mar
21
Sa

Undergrad Spring

3 mi 13 mi 26 mi
May 2026
May
2
Sa

Boise River Marathon

5 km 10 km Half Marathon Marathon
May
16
Sa

YMCA Famous Idaho Potato Marathon

5 km 10 km Half Marathon 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
13
Sa

Dirty Dog Trail Marathon and Half Marathon

Trail Run 13 mi 26 mi
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
18
Sa

Mesa Falls Marathon

13 mi 26 mi
Jul
25
Sa

Idaho Falls Marathon

5 km Half Marathon Marathon
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
Sep
24
Th

Northwest Series Day 6

Trail Run 5 km 10 km ... 26 mi 50 km
October 2026
Oct
10
Sa

Hayden Lake Marathon

5 km 10 km Half Marathon Marathon
Oct
10
Sa

City of Trees Marathon

5 km 10 km Half Marathon Marathon
Oct
17
Sa

Idaho Running Day

5 km 10 km 13 mi 26 mi