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.

Secondary forest roads serve the sector for forestry and recreational tourism activities, in particular the forest road R0320 which runs on the north side of lakes Maigre and Valois and crosses the Middle River upstream of Lake Maigre.

Forestry is the main economic activity in the sector; recreational tourism, second.

The main watersheds neighboring the Rivière du Milieu are: The "rivière du Milieu" has its source at the mouth of Warbonne Lake (length: 1.3 kilometres (0.81 mi); altitude: 857 metres (2,812 ft)).

From there, the current over 2.4 kilometres (1.5 mi) towards the south-east in a deep valley and forming a small curve towards the north-east to go around a mountain, until its mouth.