| Rivière du Moulin | |
| Pushpin Map: | Quebec |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Capitale-Nationale |
| Subdivision Type4: | Regional County Municipality |
| Subdivision Name4: | Charlevoix Regional County Municipality |
| Subdivision Type5: | Municipality |
| Subdivision Name5: | Petite-Rivière-Saint-François and Baie-Saint-Paul |
| Length: | 8.5km (05.3miles) |
| Source1: | Small lake in agricultural and forest area |
| Source1 Location: | Petite-Rivière-Saint-François |
| Source1 Coordinates: | 47.3812°N -70.5947°W |
| Source1 Elevation: | 442 m |
| Mouth: | Saint Lawrence River |
| Mouth Location: | Baie-Saint-Paul |
| Mouth Coordinates: | 47.4233°N -70.5095°W |
| Mouth Elevation: | 4 m |
The Rivière du Moulin is a tributary of the west shore of Saint-Paul Bay on the northwest shore of the St. Lawrence River. This river flows in the municipality of Petite-Rivière-Saint-François and in the city of Baie-Saint-Paul, in the Charlevoix Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.
The route 138 runs along the eastern and upper part of this small valley. While the Chemin de la Pointe which runs along the western part of Baie Saint-Paul, serves the lower part. Recreational and tourist activities are the main economic activities in this area thanks in particular to the "Massif de Charlevoix" alpine ski center, which is located very close to the east side of the upper part of this river and whose mountainside is suitable for skiing alpine faces the river.
The surface of the Moulin river is generally frozen from the beginning of December until the end of March, except the backwater areas; however, safe traffic on the ice is generally from mid-December to mid-March. The water level of the river varies with the seasons and the precipitation; the spring flood occurs in March or April.
The Moulin river rises at the mouth of a small lake (length: ; altitude:) in a hamlet, between the Saint- Jean (on the west side) and Mont Gabrielle-Roy (on the east side) in the municipality of Petite-Rivière-Saint-François. This source is located at:
From its source, the course of this river descends on with a drop of, according to the following segments:
The Moulin River flows on the west shore of Baie Saint-Paul from the northwest shore of St. Lawrence River, in the municipality of Baie-Saint-Paul. This confluence is located at:
This name is printed on the map Domaine forestier du Séminaire de Québec, 1955–01. It is also found on the broth of the Maillard card, 1959-05-21, item 133. Formerly, there was a sawmill at its mouth. Rivière de la Factory and Rivière des Cascades are two variants of this name.
The toponym "Rivière du Moulin" was formalized on December 5, 1968 at the Place Names Bank of the Commission de toponymie du Québec.[2]