Four Birds Trail is a 6.4 mile lightly trafficked out and back trail located near Jefferson Township, New Jersey that features a river. The trail is rated as difficult and primarily used for hiking and trail running. Dogs are also able to use this trail.
Four Birds - Northern Section
I've run or hiked Four Birds dozens of times. Great place.
My friend just told me he was hiking this trail today with his dogs. They encountered a bear (he said by the north terminus by Rt 23 in Newfoundland) who wouldn't budge. The dogs were within eight feet of it and barking but it would not move on. My friend had to grab the dogs by their harness and drag them away going right past the bear. He said the encounter was "chilling".