Our annual poll is now live!
Which races deserve the top spot in each state for 2026?
Our annual poll is now live!
Which races deserve the top spot in each state for 2026?
South Dakota has 6 active marathons this year. Races are most common in October, September, and June. Course terrain for these courses is most often mostly flat or very hilly. Typical race day temperatures range from 45°F to 67°F.
Popular races include the Sioux Falls Marathon, Deadwood-Mickelson Trail Marathon, and Run Crazy Horse Marathon. 6 certified courses can be great Boston qualifier options. Races with the best Boston qualifying percentages include the Sundance to Spearfish Marathon — 25.9% BQ and Brookings Marathon — 12.4% BQ.
| South Dakota Marathons |
Course
|
PR Score
|
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|---|---|---|---|---|---|---|---|
Deadwood-Mickelson Trail MarathonDeadwood, SD06/07/2026 |  Very Hilly 237 Finishers |
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Leading Ladies MarathonSpearfish, SD08/23/2026 |  Downhill125 Finishers |
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Sundance to Spearfish MarathonSpearfish, SD09/13/2026 | Downhill85 Finishers |
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Sioux Falls MarathonSioux Falls, SD09/20/2026 |  Mostly Flat404 Finishers |
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Brookings MarathonBrookings, SD10/03/2026 | Mostly Flat89 Finishers |
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Run Crazy Horse MarathonHill City, SD10/04/2026 | Very Hilly135 Finishers |
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