Garden State Parkway to the end.
Get on 87 South.
Get on Palisades North. Take this to the end.
Watch close for left hand exits by 18, make sure you stay on the Palisades.
At the end of the Palisades cross the Bear Mountain Bridge.
After the bridge make a right and continue along side of the mountain with the Hudson River on your right.
At the bottom follow signs for Route 9 South.
Take this to Welcher Avenue exit.
Make a left at the bottom of the ramp and make a right onto Washington (rd/ave?) at the gas station on your left.
Parking on your left in dirt lot around a mile up.