Lean Horse is more geared towards folks doing the 100, but you still have a blast doing the 50k or 50m. This was the first time I ran on the newer course that starts/ends in Custer. It is so much nicer, as you are on the Mickelson trail the whole time, a rail-trail. It's a nice run through the Black Hills. Aid Stations and volunteers were fantastic and the RD is great. I'll be going back next year and hopefully will be recovered enough from my injury to do the 50 miler. MM#1058