Route 257 is a north–south highway on the south shore of the St. Lawrence River, in the Eastern Townships region of Quebec, Canada.

Its northern terminus is in Saint-Adrien at a junction with Route 216, and its southern terminus is at the Pittsburg–Chartierville Border Crossing, where it becomes U.S. Route 3 as it enters Pittsburg, New Hampshire.

This Quebec road, road transport or highway-related article is a stub.

You can help Wikipedia by expanding it.