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Marathons in South Dakota, United States

30 upcoming marathons listed in South Dakota across 2 cities. Next: Lennox Lapsley's Running for Healthy Hearts on July 11, 2026.

30marathons upcoming
2cities
July 11, 2026Next race
Marathon, Half marathon, Ultra, 10K, 5K, RelayDistances

List your marathon with verified details

Hosting a marathon in South Dakota, United States? Submit the official source so runners can verify the race before they register.

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Already listed in South Dakota, United States? Open the race and use Update listing. Missing event? Start here with the location prefilled.

Planning notes for South Dakota, United States

Use this region page to shortlist 30 upcoming races by date, distance, registration path, and official source.

  • Next raceLennox Lapsley's Running for Healthy Hearts on July 11, 2026
  • Busy monthsAugust (7), October (7), September (7)
  • DistancesMarathon, Half marathon, Ultra, 10K, 5K, Relay
  • VerifyOpen each race page, then confirm details from its official, registration, course-map, or source link.