The Blanche River flows through the municipalities of Saint-Jacques-le-Majeur-de-Wolfestown and Saint-Julien, in the Les Appalaches Regional County Municipality (MRC), in the administrative region of Chaudière-Appalaches, in province of Quebec, in Canada.

The main neighboring watersheds of the Blanche river are: The Blanche River originates in the mountains on the north shore of Lake Breeches, in the municipality of Saint-Jacques-le-Majeur-de-Wolfestown.

From its head area, the Blanche river flows over 12.2 kilometres (7.6 mi) divided into the following segments: The Blanche River empties on the west bank of the rivière au Pin.

This confluence is located east of the village of Saint-Julien, west of Mont Caribou and 1.1 kilometres (0.68 mi) downstream of the boundary between Irlande) and Saint-Julien.

The toponym “rivière Blanche” was made official on August 7, 1978, at the Commission de toponymie du Québec.