Running: 30K Trail Run, 50 Mile Trail Run (Ultra), 50K Trail Run (Ultra)
Custer, South Dakota
August 20th, 2023 
Mickelson Trail, Custer, SD
The Lean Horse 100 - Saturday Events is a Running race in Custer, South Dakota consisting of a 30K Trail Run and 50 Mile Trail Run (Ultra) and 50K Trail Run (Ultra).
The Lean Horse 100 has a Great Ultra Marathon Course for first timers and/or those interested in setting a PR.
The Lean Horse Ultra Marathon is run in August every year in the Black Hills of South Dakota. It was first run in 2005.
It features a 100-mile race, a 50-mile race, a 30-mile race, and a 20-mile race. The course is held on the George S. Mickelson Trail.
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