[2] The surface of the Ouiatchouaniche 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 Ouiatchouaniche river has its source in Lake Quentin (length: 0.38 km (0.24 mi); altitude: 387 m (1,270 ft)) in the unorganized territory of Lac-Ashuapmushuan.

Lower section of the Ouiatchouaniche river (segment of 15.7 km (9.8 mi)) Note: First in forest area, then agricultural.

This confluence is located on the north side of the city of Roberval, either: From the mouth of the Ouiatchouaniche river, the current crosses Lake Saint-Jean for 34.5 km (21.4 mi) towards the northeast, follows the course of the Saguenay River via the Petite Décharge on 172.3 km (107.1 mi) eastwards to Tadoussac where it merges with the Estuary of Saint Lawrence.

The second part of the term "Ouiatchouaniche" can also resemble "Ouananiche", which turns out to be the name of a river whose confluence with Lac Saint-Jean is 7.9 km (4.9 mi) to the southwest.