The Renaud River is a tributary of the west bank of the lower part of the rivière du Gouffre, flowing entirely in the town of Baie-Saint-Paul, in the Charlevoix Regional County Municipality, in the administrative region of Capitale-Nationale, in the province from Quebec, to Canada.

Besides the Baie-Saint-Paul residential area, agriculture is the main economic activity in this valley.

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

The Renaud river takes its source at the foot of Cap de la Mare from a stream (coming from the west) which descends the cliff.

[1] The toponym "Rivière à Renaud" was formalized on August 29, 1972, at the Place Names Bank of the Commission de toponymie du Québec.