Lean Horse Ultra
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Lean Horse Ultra
The Lean Horse Ultra Marathon is an ultramarathon series held on the George S. Mickelson Trail in the Black Hills of South Dakota. The 2027 event is scheduled for July 30 to 31, 2027. The event was first held in 2005 and is typically staged in August each year.
Races run on crushed limestone along the Mickelson Trail and feature extended gentle climbs because the course follows an old railroad bed. The hosting town is Custer, South Dakota. Average August daytime temperatures are reported as a high of 79 degrees and a low of 53 degrees.
Event distances are offered as follows:
- 100 Mile
- 100 Mile Relay up to 5 runners
- 50 Mile
- 30 Mile
- 20 Mile
- 30 Mile Black Hills CrossFit Edition singles or teams of 3 or 6
The event is listed as the 33rd sanctioned 100 mile race in the United States. It is described as a non technical rails to trails course noted for scenic views along the Black Hills. Visit the organization's website for the most recent information.