Valley of the Notre Dame Mountains, Gaspé Peninsula , eastern Quebec province, Canada.
Extending for some 60 mi (100 km), it forms a direct lowland route through the mountains from the St. Lawrence River to the Atlantic coast. It serves as an important transportation route between the Maritime Provinces and the Canadian mainland. It is drained by the Matapédia River, which flows 50 mi (80 km) to join the Restigouche River.