South Dakota Marathons

Complete list of marathons happening in South Dakota in 2025 with dates, locations, and registration information.

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Deadwood Mickelson Trail Marathon

Deadwood, South Dakota

May 31, 2025

Sioux Falls, South Dakota

August 31, 2025

Spearfish, South Dakota

September 14, 2025

Deadwood, South Dakota

September 20, 2025

Brookings, South Dakota

October 18, 2025

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