South Dakota · Marathon
Marathons in South Dakota
South Dakota currently has 5 upcoming marathons with a confirmed date listed in RaceRove. They take place in Deadwood, Spearfish, Custer and Rapid City and elsewhere.
Another 5 annual marathons are waiting for next year's date to be announced.
- Upcoming, date confirmed
- 5
- Active listings
- 10
- Cities with races
- 8
More ways to browse South Dakota
Upcoming marathons in South Dakota
All 5 with a confirmed date, soonest first.
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Lean Horse Ultra MarathonCuster, SDMarathon100 Mile100 Mile Relay (up to 5 people)20 Mile +3 more ~95 runners
Dates come from each race's own listing. Always confirm on the organiser's site before you book travel.
Largest marathon events in South Dakota
By estimated field size across all distances at the event.
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Crazy Horse MarathonHill City, SD Usually held in October · next date not announcedMarathonHalf5-Person Relay ~900 runners
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Brookings MarathonBrookings, SD Usually held in May · next date not announcedMarathonHalfRelay ~600 runners
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Run Crazy HorseCrazy Horse, SD Usually held in October · next date not announced3 to 5-Person Marathon Relay - Team Captain RegistrationFast 5KHalf MarathonKids 1K +1 more ~135 runners
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Sundance to Spearfish MarathonSpearfish, SD Usually held in September · next date not announcedMarathon ~131 runners
When marathons happen in South Dakota
- June
- 1 upcoming race
- July
- 2 upcoming races
- August
- 1 upcoming race
- September
- 1 upcoming race
South Dakota cities with the most marathons
- Deadwood
- 1 upcoming race
- Spearfish
- 1 upcoming race
- Custer
- 1 upcoming race
- Rapid City
- 1 upcoming race
- Sioux Falls
- 1 upcoming race
Annual events awaiting their next date
These marathons are held every year, but the next date isn't in the listing yet. The month shown is when each is usually held.
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Crazy Horse MarathonHill City, SD Usually held in October · next date not announcedMarathonHalf5-Person Relay ~900 runners
-
Brookings MarathonBrookings, SD Usually held in May · next date not announcedMarathonHalfRelay ~600 runners
-
Run Crazy HorseCrazy Horse, SD Usually held in October · next date not announced3 to 5-Person Marathon Relay - Team Captain RegistrationFast 5KHalf MarathonKids 1K +1 more ~135 runners
-
Sundance to Spearfish MarathonSpearfish, SD Usually held in September · next date not announcedMarathon ~131 runners
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Black Hills Veterans March and MarathonDeadwood, SD Usually held in September · next date not announcedMarathon10K16 Miles
Marathons in nearby states
Guides from the RaceRove blog
- 8 min read How to Choose Your First Marathon A practical checklist for choosing a first marathon based on course, weather, cutoff, travel, field size and support.
- 7 min read How to Find a 5K, 10K, Half Marathon or Marathon Near You A practical way to find running races near you: pick a distance, decide how far you'll travel, read the listing properly and confirm the details before you register.
- 4 min read Diplo's Run Club 2026-27: Every City, Date and Course Diplo's Run Club is a 5K with a post-race concert. Every US date for 2026-27 (San Francisco, New York, Los Angeles, San Diego and Phoenix), start times and courses.
- Blog All guides Planning advice for finding, choosing and travelling to races.
Marathons in South Dakota: common questions
- How many marathons are there in South Dakota?
- RaceRove currently lists 5 upcoming marathons in South Dakota with a confirmed date, plus 5 annual events whose next date hasn't been announced yet.
- How long is a marathon?
- A marathon is 26.2 miles (42.2 kilometres).
- Which South Dakota cities have the most marathons?
- By upcoming events listed in RaceRove: Deadwood (1), Spearfish (1), Custer (1), Rapid City (1) and Sioux Falls (1).
- What is the biggest marathon in South Dakota?
- By estimated field size, the largest event with a marathon listed in South Dakota is the Deadwood Mickelson Trail Marathon, with about 2,000 runners across all of its distances.
Search every marathon in South Dakota
Filter by month, course profile and field size, save races to a shortlist and compare them side by side in the interactive search.