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 his course, going toward the boundary Saint-Ubalde and
Saint-Adelphe, receiving water from lakes Sainte-Anne and Perch, and then meanders southeastward, nearly parallel to the
Batiscan River) and through 16 lots in the First Price Row in the Eastern section of Saint-Adelphe, where its course becomes very coil. After descending the moraine more than a kilometer in the northeast row in the municipality of
Sainte-Anne-de-la-Pérade, Charest River forks to 90 degrees to the right (southbound) entering
Saint-Prosper-de-Champlain, moving towards the village, along the foot of the moraine. Then the river forks again 90 degrees to the left and passes through the agricultural zone lowlands of Saint-Prosper-de-Champlain, and goes to flow into the delta of the
Sainte-Anne River near "Ile Rivard" (Rivard island), in the municipality of Sainte-Anne-de-la-Pérade. In its course of Charest River drains a lot of farmland and forest areas especially in his journey through the moraine. In 1950, a landslide on the banks of the Charest River in Saint-Prosper-de-Champlain left a mark on an area of . This shift has been diverting the course of the channel in a loop and altered the hydrological dynamics. == Gendron Creek ==