From the DEC Catskill Park State Land Master Plan:
The Diamond Notch Primitive Bicycle Corridor traverses the Hunter – West Kill Wilderness. It is located in the Town of Hunter, Greene County and is about 3 miles long and 100 feet wide. It is approximately 36 acres. The Diamond Notch Foot Trail is located within the corridor and from the south connects the Diamond Notch Road in Lanesville to the Spruceton Road to the north. The portion of this foot trail on Forest Preserve is an abandoned town road. The management planning for this corridor will be contained in the Hunter – West Kill Wilderness UMP.
The Diamond Notch lean-to is located within the corridor. There is parking at both the north and south terminus of the trail.