It flows in the municipalities of Saint-Elzéar and Siante-Marie-de-Beauce, in the La Nouvelle-Beauce Regional County Municipality, in the administrative region of Chaudière-Appalaches, in Quebec, in Canada.

The main neighboring watersheds of the Vallée river are: The Vallée river has its source in a mountainous area, in the municipality of Saint-Elzéar.

This head area is located 2.5 kilometres (1.6 mi) west of the center of the village of Saint-Elzéar, at 6.0 kilometres (3.7 mi) west of Chaudière River and 8.0 kilometres (5.0 mi) northeast of Mont-Sainte-Marguerite.

This confluence is located 0.6 kilometres (0.37 mi) upstream from Île Perreault, 4.2 kilometres (2.6 mi) downstream from the bridge in the village of Sainte-Marie-de-Beauce and 4.0 kilometres (2.5 mi) upstream of the Scott bridge.

The toponym Rivière Vallée was formalized on August 8, 1977, at the Commission de toponymie du Québec.