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2 marathons found for "South Dakota", Ultra marathon, United States. Keep the list broad first, then tighten the filters when a race looks realistic.





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South Dakota, United States
17OCT
ULTRA
Brookings Marathon
South Dakota, United States
October 17, 2026 OCT
Canton, South Dakota, United States
07NOV
ULTRA
Glacier Hills Ultra 50K
Canton, South Dakota, United States
November 7, 2026 NOV

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