Find upcoming endurance races in Idaho, laid out by month. Scan the dates, line them up against your training, and find the race that fits your season.
Endurance Grid lists 86 races in Idaho, from July 2026 to June 2027 across 40 cities.
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The lay of the land
Idaho runs a year-round race calendar, so there’s almost always a race near you. The calendar is busiest in August, September, and October, with races most often held in Boise, Sandpoint, and Coeur d'Alene.
Races in Idaho cover the jagged Sawtooth Range and broader Rocky Mountains in the center and north, with the flatter Snake River Plain running across the south. Courses split between steep, high-altitude mountain trail ultras and flatter, high-desert road races along the plain.
Conditions vary widely by region across Idaho, so weather lives where it’s accurate — each race page shows its typical race-day high, low, and rain chance from NOAA climate normals for that venue and date.
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