 After the crossing, NY 131 leaves Louisville for the town of Massena, crossing the Massena Power Canal.Paralleling the riverside, NY 131 passes within of the St. Lawrence and Long Sault Island before turning to the southeast and soon east through Massena.Some residences appear after the intersection with Dennison Road, however the route remains mainly rural, passing an inlet of the St. Lawrence just south of the intersection with Barnhart Island Road.