Its northern terminus is in Saint-Nicéphore, now part of Drummondville, at the junction of Route 143, and the southern terminus is in Abercorn at the border with Richford, Vermont at the Richford–Abercorn Border Crossing.
Its northern endpoint is in Saint-Nicéphore, now part of Drummondville, at the intersection of Route 143; and its southern endpoint is in Abercorn on the border with Richford, Vermont, at the Richford–Abercorn Border Crossing.