The "Lac du Moulin" is located in the northern part of the Laurentides Wildlife Reserve.

The Lac du Moulin watershed is mainly served indirectly by the forest road R0287 which runs on the east and north sides of the lake.

The surface of Lac du Moulin is usually frozen from the beginning of December to the end of the Mill, however safe circulation on the ice is generally done from mid-December to mid-Mill.

This lake comprises a strait of a hundred meters in width formed by two peninsulas advancing towards each other from the east and west banks.

The mouth of this lake is located at: From the mouth of Lac du Moulin, the current successively follows the course of the Rivière du Moulin over 82.2 km (51.1 mi) generally north and from Saguenay River on 126.1 km (78.4 mi) eastward to Tadoussac where it merges with the Saint Lawrence estuary.