The Jacob River is a tributary of the north shore of the Malbaie River flowing generally southward successively into zec du Lac-au-Sable into the unorganized territory of Mont-Élie, in the city of La Malbaie and in the city of Clermont at the end of the course, in Charlevoix-Est Regional County Municipality, in Quebec, Canada.

This small forest valley is mostly accessible in its lower part by the Marais road which goes to the North, and in its upper part by a secondary forest road serving the west bank of the river.

Nevertheless, safe ice traffic is generally from late December to mid-March.

This wild lake is located in a small forest valley (in the north-south axis).

Hydro-Québec high-voltage lines (north-south direction) pass on the west side of the lake.