Half marathons in Idaho

7 upcoming half marathons in Idaho. Filter by date, exact distance, or elevation.

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This calendar in numbers

This calendar currently lists 7 upcoming events, from Sep 26, 2026 to Oct 24, 2026. October is the busiest month, with 5 events scheduled. Events are spread across 5 different locations; Boise hosts the most (3). Course distances range from 17.7 km to 21.1 km.