The semi wild burros which roam in part of Custer State Park are direct descendents of the animals brought here in the late 1920's to haul tourists to the top of Harney Peak. After the attraction failed in the 1930’s, the burros were loose.
Bison can run up to 35 mph with stamina exceeding that of a horse, and easily jump over a 6 foot fence with surprising agility for such a hulking beast.
The P.D. towns of Windcave National Park and Custer State Park are among the best wild and untampered ones you can find anywhere. Visitor's tip: Plan your visits earlier in the day and during the summer months to view them while most active. P.D's nap in their deep burrows during the hot summer afternoons and begin to cut back activity during September in preparation for hibernation which can last to April.