The rivière du Mont Saint-Étienne (English: Mont Saint-Etienne river) is a tributary of the Sainte-Anne river, flowing on the north bank of the Saint Lawrence River, in the unorganized territory of Lac-Jacques-Cartier and the municipality of Saint-Ferréol-les-Neiges, in the La Côte-de-Beaupré Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.

Chemin du rang Saint-Édouard runs southwest of the middle part of the river course.

The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.

This lake wedged between the mountains has two outlets: one flows west descending towards the rivière du Camp Brûlé passing through First Lynch Lake; the other east along the Mont Saint-Étienne river.

This second mouth of the lake (East side) is located at: This river bypasses Mont Saint-Étienne.