You must backtrack on this trail once you ride down it.
Start out across from the bottom of the Muncy Ridge "B" Trail
at the intersection of the old loggers path. Ride it down to the east. The top has a pretty technical rock section, then it clears out some for some faster riding with some rocky sections here and there. Once you hit the clearing where there are posted signs, that is the end.
YOU HAVE TO RIDE BACK UP THE TRAIL TO GET OUT. There is no other way out.