Go north on the Parkway to exit 4, "Route 9W". At the end of the ramp, turn left onto Route 9W North. Cross over the border into New York State, and then go exactly two more miles on 9W. Turn right at the sign for "TALLMAN STATE PARK". (This is Rockland Road). Stay straight on Rockland Road until it ends at a stop sign. At the stop, turn right onto Ferdon Ave. Staying straight, you'll go through a traffic light. At this point, the name of the road changes to Piermont Ave. Go around a curve and we are the fifth building on the left.