The Rivière des Chutes (French pronunciation: [ʁivjɛʁ de ʃyt], "River of the Falls") drains mainly the municipality of Saint-Narcisse, and also Saint-Stanislas, at the end of its course.

Because of the geographical position of the lake, the "chemin de la Grande ligne" (Great Line road) makes a curve around the lac on the north.

Thus, the main source of the "Rivière des Chutes" begins at the edge of the Lordships of Batiscan and Champlain, in a wet area, where it flows southeast for approximately 1.9 kilometres (1.2 mi) (measured in a straight line) in the First row of Radnor.

To overcome this obstacle (course of the river), a 2.6 kilometres (1.6 mi) road segment passes about 140 metres (460 ft) south of the "Grande Ligne" (Great line) in the "First row of the falls" (Premier rang des chutes).

Premier rang des chutes (English: First row of the Falls) Then the river veers to the South through the path of the "Grande ligne" (on the 4th lot northwest of Frigon road which is perpendicular to the "Grande ligne") to go running in the "Premier rang des chutes" (First row of the Falls), in the Lordship of Champlain where it crosses 32 lots of land.

Finally, the river enters in the territory of Saint-Stanislas in the "rang des Chutes Sud-Est" (row of the falls - South-East) where it crosses six lots pointing to his mouth.

[4] Mouth The "Rivière des Chutes" flows mainly in agricultural zone, sometimes marking several small coils, passing through some forested areas (especially early in it course and at the end).

In Saint-Narcisse, "Rivière des Chutes" has always been a barrier to the transport of the first settlers, particularly if they wanted to reach the row Saint-Pierre (northern part of the municipality).