Lean Horse 100 Mile Ultra Marathon
Schedule
Fri, 15 Aug, 2025 at 12:00 pm
UTC-06:00Location
Custer YMCA | Custer, SD
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The Lean Horse Ultra Marathon is run in August every year in the Black Hills of South Dakota. It was first run in 2005. The course is held on the George S. Mickelson Trail.Course Overview
Surface: Crushed Limestone
Course: Mickelson Trail
Elevation Profile: Extended gentle climbs. This is due to the fact the course is on an old railroad bed.
Hosting Town: Custer, South Dakota
Average August daytime temperature: High of 79 degrees. Low of 53 degrees.
Fun Facts
33rd sanctioned 100-mile race in the United States
Known as one of the best non technical courses in the United States
One of the most scenic rails to trails courses in the country
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Where is it happening?
Custer YMCA, 644 Crook Street,Custer, South Dakota, United StatesEvent Location & Nearby Stays:
