[1] Forestry is the main economic activity in most of this valley; nevertheless, agriculture is practiced in the lower part.

[2] The surface of the Ouananiche River is usually frozen from the beginning of December to the end of March, except the rapids areas; however, traffic on the ice is generally safe from mid-December to mid-March.

The Ouananiche River originates from Lac Brassard (length: 0.375 km (0.233 mi); altitude: 291 m (955 ft)).

This confluence is located at 3.5 km (2.2 mi) west of the entrance to Anse de Chambord which is delimited between Pointe de Chambord (to the north) and Pointe aux Pins (to the south) The confluence of the Ouaniche river is located at: From the mouth of the Ouananiche river, the current crosses Lac Saint-Jean to the east for 33.6 km (20.9 mi) to the northeast, follows the course of the Saguenay River (via the Little Landfill) on 172.3 km (107.1 mi) eastwards to Tadoussac where it merges with the Estuary of Saint Lawrence.

The toponym "Ouananiche river" was formalized on December 5, 1968, at the Bank of Place Names of the Commission de toponymie du Québec.