This scene is from the area downstream from Breakneck Falls at McConnells Mill State Park in Lawrence County, PA. This particular stream is named Cheeseman Run and it empties into Slippery Rock creek about 20 feet behind where this was taken.
Posted 5/23/2019 - One of the largest waterfalls in the area, Quakertown Falls has since been posted as private property. There was talk about turning the area into a park a couple years go, but that hasn't materialized yet.
Photograph added to the gallery on 5/21/2019. A side view of Breakneck Falls at McConnells Mill State park. I had always thought this waterfall was much smaller than it really is, and was very surprised when I saw it in person for the first time.