 There it passes to the north of Lake Nipigon, then runs as far south as the 48th parallel before veering north again to cross the western border of Quebec just south of Lake Abitibi.It then meanders northeasterly across Quebec to the southwestern boundary of Labrador.From there, it follows the boundary jaggedly north to Killiniq Island where it becomes the boundary between Nunavut and Labrador before reaching its terminus at Cape Chidley on the Labrador Sea.