The Rivière des Outaouais, also known as the Ottawa River, is a major waterway in Canada. It flows for about 1,271 kilometers, starting from the Laurentian Mountains in Quebec and emptying into the Saint Lawrence River. The river forms part of the border between the provinces of Ontario and Quebec and is an important resource for both regions. Historically, the Rivière des Outaouais served as a vital transportation route for Indigenous peoples and later for European explorers and fur traders. Today, it is popular for recreational activities such as kayaking, fishing, and boating, attracting many visitors to its scenic landscapes.