The valley of the Aulnaies river is served by the route 169 (connecting Quebec (city) to Alma), by the chemin du 2e rang Est, rue La Barre and chemin du Rang Saint-Isidore, especially for forestry, agriculture and residents of the sector.

The surface of the Rivière des Aulnaies is usually frozen from the beginning of December to the end of March, however safe circulation on the ice is generally done from mid-December to mid-March.

This source is located at: From its source, the Aulnaies river flows over 5.9 km (3.7 mi) with a drop of 19 m (62 ft), in agricultural and village areas, according to the following segments: The Aulnaies river flows on the east bank of la Belle Rivière.

This confluence is located in Village-de-la-Chute, at: From the mouth of the Aulnaies river, the current descends the course of the Belle Rivière to the northwest on 6.1 km (3.8 mi), then crosses the eastern part of Lac Saint-Jean to the north on 15.4 km (9.6 mi), take the course of the Saguenay River via the la Petite Décharge on 172.3 km (107.1 mi) until Tadoussac where it merges with the Saint Lawrence estuary.

[2] The toponym “Rivière des Aulnaies” was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.