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.

May
← The calendar

By month

100 mile races in May

15 hundred-mile ultras on the May calendar — mapped, dated, and rated. A ~ marks a projected date not yet announced.

15 races5 qualifiersSee them on the map ↗
MAY2'27

Cocodona 250

WS

Black Canyon City, AZ · 250 mi

▲ 38,000 ftPoint to point
MAY4'27

Sedona Canyon 125

WS

Jerome, AZ · 125 mi

▲ 16,000 ftPoint to point
MAY8~'27

Peak

Pittsfield, VT

▲ 19,000 ftLoop
MAY12'27

Born to Run

Los Olivos, CA

▲ 14,000 ftLoop
MAY14~'27

Hellbender

WSHR

Old Fort, NC

▲ 25,000 ftOut & back
MAY15~'27

Keys

Key Largo, FL

▲ 1,000 ftPoint to point
MAY15~'27

Massanutten

WS

Fort Valley, VA

▲ 20,500 ftLoop
MAY20'27

Infinitus

Ripton, VT

▲ 16,000 ftLoop
MAY21~'27

Cruel Jewel

WSHR

Blue Ridge, GA

▲ 27,000 ftOut & back
MAY22~'27

Crown of the Crest

Fremont, NE

MAY22'27

Nanny Goat

Riverside, CA

▲ 3,000 ftLoop
MAY22'27

Pigtails Challenge

Renton, WA

▲ 6,000 ftLoop
MAY22~'27

Veterans Memorial 150

Ludington, MI · 150 mi

▲ 2,500 ftPoint to point
MAY29~'27

Chesterfield Gorge

West Chesterfield, MA

▲ 5,000 ftOut & back
MAY29'27

Iron Will

Enterprise, KS

▲ 5,000 ftOut & back
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