Hundred·Atlas
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Hundred·Atlas

CalendarMapRacesSubmit a Race
By stateBy monthWS qualifiersHardrock qualifiersFirst hundred
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Race data compiled from public sources; dates change — always confirm with the race organizer. Terrain: Mapzen/AWS Open Data, USGS 3DEP.

ID
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Mountain region

100 mile races in Idaho

3 hundred-mile ultras in Idaho — mapped, dated, and rated.

3 races2 qualifiersSee them on the map ↗
JUL25'26

Standhope

Ketchum, ID

▲ 22,000 ftLoop
SEP19'26

IMTUF

WSHR

McCall, ID

▲ 20,000 ftLoop
JUN4'27

Scout Mountain

HR

Pocatello, ID

▲ 24,000 ftLoop

Nearby states

MontanaWyomingNevadaUtahColoradoArizonaNew Mexico

Planning by calendar instead? Browse hundred-milers by month.