This wiki page provides a listing of marathons and/or half-marathons in South Dakota. When a race logo is provided, click on the picture to go to the official website. Comments about these races are at the bottom of the wiki page, if posted.
- Deadwood Mickelson Trail Marathon
- Location: Deadwood, South Dakota
- Distance(s): Marathon, Half-Marathon
- Official Website
- Swan Lake Marathon
- Location: Viborg, South Dakota
- Distance(s): Marathon, Half-Marathon
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