Did you know? Deep River is located at a latitude of 46°06′ north and longitude 77°30′ west, in the Boreal Forest biozone, and has an area of 50.87 square kilometres. The town sits on the section of the Ottawa River referred to as “La Rivière Creuse” (the “Deep River”) by 17th-century French explorers, and which later was at the heart of Canada’s 19th-century timber trade.