Lean Horse Ultra

The Lean Horse Ultra Marathon is an annual running event held in August in the scenic Black Hills of South Dakota, featuring a variety of race distances including 100 miles, 50 miles, 30 miles, and 20 miles, as well as a unique 30-mile Black Hills CrossFit Edition. The course runs along the George S. Mickelson Trail, known for its crushed limestone surface and gentle climbs, making it one of the best non-technical ultra courses in the United States.

Established in 2005, the event attracts runners from across the country, celebrating both individual and relay team participation. Visit the organization's website for the most recent information.