Route 37 continues northeast and starts to turn slightly eastward as it approaches the top of New York State, passing through the village of Waddington. At NY 131's western terminus, the trail switches to Route 131, which runs north of the village of Massena rather than through it. Past the city, Route 131 turns south toward its eastern terminus at Route 37. Route 37 then carries the trail to the hamlet of Rooseveltown in the town of Massena, where the Seaway Trail ends just shy of the Franklin County line.