The Rivière du Milieu is a tributary of the Launière River, flowing in the unorganized territory of Lac-Jacques-Cartier, in the La Côte-de-Beaupré Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, at Canada. Forestry is the main economic activity in the sector; recreational tourism, second. The surface of the Middle River (except the rapids areas) is usually frozen from the end of November to the beginning of April, however the safe circulation on the ice is generally done from mid-December to the end of March.