Ottawa River

The Ottawa River (French: Rivière des Outaouais; Algonquin: Kitchissippi) is a river in the Canadian provinces of Ontario and Quebec, as well as the federal district of Ottawa, the national capital and fourth-most populous city of Canada. It is named in honour of the Algonquin word for 'to trade', as it was the major trade route of Eastern Canada at the time. For most of its length, it defines the border between Ontario and Quebec; the portion of the Ottawa River passing Ottawa divides the federal district (on the south bank) from the Québécois city of Gatineau (on the north bank). It is a major tributary of the St. Lawrence River and the longest river in Quebec.