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 63 races in Idaho, from October 2026 to September 2027 across 29 cities.
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Idaho runs a year-round race calendar, so there’s almost always a race near you. The calendar is busiest in November, October, and May, 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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Search every race across all 50 states by sport, distance, or your zip code.
Endurance races in Idaho happening in the next 7 days, in date order. Browse what’s coming up and sign up soon.