The Coulonge River is a predominantly wilderness river in western Quebec, Canada. A popular river for whitewater canoeing enthusiasts, it is often grouped together with the Dumoine and Noire Rivers as three of a kind. The three rivers share the same watershed, and have similar whitewater characteristics. All three empty into the Ottawa River withi…The Coulonge River is a predominantly wilderness river in western Quebec, Canada. A popular river for whitewater canoeing enthusiasts, it is often grouped together with the Dumoine and Noire Rivers as three of a kind. The three rivers share the same watershed, and have similar whitewater characteristics. All three empty into the Ottawa River within a distance of 105 kilometers from one another.