The Métascouac River is a tributary of the east bank of the Métabetchouane River (via the Petit lac Métascouac), flowing in the central west part of the Laurentides Wildlife Reserve, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.

The course of the river crosses the regional county municipalities of: Forestry is the main economic activity in this valley; recreational tourism, second.

The surface of the Métascouac River (except the rapids zones) 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.

The main watersheds neighboring the Métascouac River are: The Métascouac river has its source at the mouth of Lac Goulet (length: 2.0 kilometres (1.2 mi) in the shape of a Y whose mouth (south side) is at the base of the letter; altitude: 471 metres (1,545 ft)).

From its source (mouth of Lac Goulet), the course of the Métascouac river flows over 17.4 kilometres (10.8 mi), with a drop of 32 metres (105 ft) according to the following segments: From the confluence of the Métascouac river, the current flows over: The toponym "rivière Métascouac" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.