Marathons in Idaho, United States
5 upcoming races are listed in Idaho, including 3 marathons, 4 half marathons and 2 ultras. The next is Boise Half Marathon on November 14, 2026.
May has the most races. Race pages link the official source where we have one. Confirm dates and prices with the organizer before you register.
5
Races listed
3
Marathons
May
Busiest month
24 May
Last updated
| Date | Race | City | Distances |
|---|---|---|---|
| 14 Nov 2026 14Nov 26 | Boise Half Marathon | Boise | 21.1K · Virtual |
| 8 Jan 2027 08Jan 27 | Dizzy Horse, A Winter Backyard Ultra | Idaho Falls | Ultra |
| 17 Apr 2027 17Apr 27 | Race to Robie Creek® | Boise | 21.1K |
| 1 May 2027 01May 27 | Boise River Marathon | Eagle | 42.2K · 21.1K |
| 16 May 2027 16May 27 | YMCA Famous Idaho Potato Marathon | Idaho | Ultra · 42.2K · 21.1K |
Around Idaho
This is the most detailed level of the directory. Widen the search to the surrounding region.
Common questions
When is the next race in Idaho?
Boise Half Marathon on November 14, 2026. The table above lists every upcoming race in date order.
Which months are busiest in Idaho?
May (2), January (1), April (1), counting every upcoming race listed in Idaho.
Which distances can I run in Idaho?
The listed races include 3 marathons, 4 half marathons and 2 ultras. Many events offer more than one distance on the same day.
How do I confirm a race’s details?
Open the race page and check its provenance ledger, which shows where each fact came from. Then confirm the date, price and entry rules with the organizer before you register or book travel.
Spotted something wrong on this page?
Dates and prices move · tell us and we check the organizer’s source