The head of the river watered many streams of the area north-west of Saint-Hyacinthe (sectors La Présentation, Saint-Charles-sur-Richelieu, Sainte-Marie-Madeleine (parish) and Sainte-Madeleine (village)).
In its journey south, the river veers to the southwest to flow over (measured by water) in Saint-Jean-Baptiste where it enters the village.