From the mouth of Lac Vert, the current crosses Kénogamichiche Lake on to the west, then follows the course of the Rivière des Aulnaies on north-west, the course of La Belle Rivière on north-west (via a bay), then crosses the eastern part of Lac Saint-Jean toward north on , follows the Saguenay river via the Petite Décharge on to Tadoussac where it merges with the Saint Lawrence estuary.