Horses Grazing Near The Mickelson Trail in Custer, South Dakota September 21, 2016 by Herb Ryan, posted in Custer, South Dakota, The Best Photo: Peg Ryan Peg Ryan is the Owner of Mile High Pilates and Yoga ” I was out walking on the Mickelson Trail late Wednesday afternoon near Crazy Horse and saw two horses grazing in a field with beautiful fall background colors” Photo: Peg Ryan – Shot on my Android phone.