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.
The northern terminus of this route is located in Saint-Nicéphore, which is now part of Drummondville, where Route 143 meets; and the southern terminus is situated in Abercorn, on the Vermont border with Richford, at the Richford–Abercorn Border Crossing.