I went ahead and did some research, the mountain lion federation (MLF not Milf) says there are no population known of mountain lions east of the Rockies minus a small endangered pop in Florida. Wildlife informer goes both ways stating there is not any mountain lions in pa but there have been sightings. PSU explicitly says No cougars in PA. I swear I’ve seen the yellow of a mountain lion. I do not believe there is a significant population. In my neck of the woods it’s sparsely populated with a lot of woods and open unused land I’ve seen plenty of bob cats. Only ever thought I’ve seen a mountain lion a few times. They have lived here before and there is a claim that the last one was killed in the late 1800s but how is somebody in 1870-90 going to be able to verify that claim. I think they went the way of the wolf, virtually becoming something different. Like wolf and “eastern coyote” which I know exists I’ve seen it kill family members chickens that roamed their yard.