High Quality Content by WIKIPEDIA articles! New York State Route 373 (NY 373) is a short state highway in Essex County, New York, within Adirondack State Park. It begins at U.S. Route 9 (US 9) and proceeds eastward, ending at a ferry landing on Lake Champlain. It intersects two county routes, several local roads, and a reference route—NY 912T—which connects it with US 9. NY 373 is the only connector between US 9 and the hamlet of Port Kent and the ferry that serves it.