Old maps show this unmarked trail as Borough Boundary Rd. It
obviously was once open to vehicles judging from the large concrete
bridges on it, but it has been closed to motor vehicles at least
since this became a county park.
Best access is via the Hasenclever trail which can be picked up
near Long Pond Ironworks, or at the end of Beech Rd.
If using Beech Rd, parking is at the boat launch/rental
area.