Found this in pa.

[Hawk637]

Found this while hiking around the mountains on our property. Was wondering if this might be an arrowhead or just a rock? Thank you.

[Hoss]

Some of the lithic materials in PA do not weather well. That being said . It could be a broken knife blade but it is difficult to tell from these pictures. Keep looking fishing and artifact collecting are two hobbies that go hand in hand. Water courses were the path ways for Native Americans. Big rivers were like today super highways .

[CoachG]

Has the shape, but I'd guess rock just from those pics. Welcome to the site.