From the mouth of Lake Simoncouche, the current follows the course of the Simoncouche River consecutively over north to the confluence with Kenogami Lake; it crosses this lake for north-east to Portage-des-Roches dam; it follows the course of the Chicoutimi River on to the east, then the northeast and the course of the Saguenay River on east to Tadoussac where it merges with the Saint Lawrence estuary.