Dunno, we always turned back after that. When I was a kid, Dad would take the family up there. We'd have a picnic at the base of the Old Man, do the nature walk thingy around the Basin, and he knew this spot where there was a natural cold spring, so we'd stop and fill up a couple of gallon bottles. By then it was almost dark and we'd head south again and get a room at one of the motels on Weir's Beach where we'd stay for a couple of nights.
I always figured the end of the Earth was on the other side of the notch.