 Serving the hamlet of Knox and the village of Altamont, NY 156 soon reaches the town of Voorheesville and ends at a junction with NY 85A.NY 156 begins at an intersection with NY 443 (Helderberg Trail) in the hamlet of Berne, in the namesake town.Winding north through the town of Berne as Berne–Altamont Road, NY 156 soon crosses into the town of Knox as a two-lane rural roadway.