Ohiopyle State Park is in Fayette County Pennsylvania. This Piggy correspondant didn't explore much because it was ridiculously hot!!
The Youghiogheny River runs through the park. There is a waterfall here (Ohiopyle Falls) and it seemed that the main activity was white water rafting and cycling.
The place seemed to be full of irritatingly fit people - no place for a Piggy, so I left before I got run out of town...