It flows southward, passing through several regions and receiving water from lakes such as Mine, Perron, Perreault, and End in its upper course.

The river serves agricultural and recreational tourism activities predominantly, with forestry also playing a significant role in the local economy.

The Charest River flows south, crossing the rows St. Paul, St. Achilles and Sainte-Anne, in Saint-Ubalde and gradually goes away from the boundaries of the Lac-aux-Sables.

In its course of 35 kilometres (22 mi)[1] Charest River drains a lot of farmland and forest areas especially in his journey through the moraine.

After crossing straight rough and not conducive to agricultural land, Gendron creek descends the great moraine in a long crevice.