| Rivière des Boudreault | |
| 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: | Les Éboulements |
| Length: | 9.5km (05.9miles) |
| Source1: | Little unidentified lake |
| Source1 Location: | Les Éboulements |
| Source1 Coordinates: | 47.5116°N -70.4115°W |
| Source1 Elevation: | 423 m |
| Mouth: | Saint Lawrence River (Anse des Boudreault) |
| Mouth Location: | Les Éboulements |
| Mouth Coordinates: | 47.4567°N -70.3631°W |
| Mouth Elevation: | 4 m |
| Tributaries Left: | Six unidentified streams. |
| Tributaries Right: | Seven unidentified streams. |
The Rivière des Boudreault (English: Boudreault's River) is a tributary of the northwest shore of the St. Lawrence River, in the municipality of Les Éboulements, in the Charlevoix Regional County Municipality, in the administrative region of Capitale-Nationale, in the province of Quebec, in Canada.
The upper part of this small valley is accessible by the chemin du rang Sainte-Marie (east–west direction). The lower part is served by road Saint-François (west side), Route du Fleuve and rue Félix-Antoine-Savard; these last two roads are parallel to the Saint Lawrence river bank. Forestry and agriculture are the main economic activities in this valley. The residential area of Saint-Joseph-de-la-Rive is located at the foot of the cliff, on the northwest shore of Baie des Éboulements.
The surface of the Boudreault River is generally frozen from the beginning of December until the end of March; 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 Boudreault River rises from a small unidentified lake (length: ; altitude:), located in the forest area on the south side of chemin du rang Sainte-Marie, in Les Éboulements. The mouth of this small lake is located at:
From this source, the course of the Boudreault River descends on, with a drop of, according to the following segments:
The Boudreault River flows into Anse des Boudreault, on the northwest shore of Baie des Éboulements, on the northwest shore of the Estuary of Saint Lawrence, in the village of Saint- Joseph-de-la-Rive. This mouth is located at:
The toponymic designation "Rivière des Boudreault" evokes the work of life of Clovis Boudreault, pioneer of the Éboulements, and his descendants who still live there. Formerly, a small power plant had been built at the foot of the cliff for the production of electricity for local needs. Upstream, near the hamlet Blagousse, a man named Osime (Onésime) Tremblay operated a card mill there at the beginning of the 20th century, which was later transformed into a sawmill and then a broom factory.
Several toponymic variants are part of the history of this watercourse: Ruisseau du Moulin à Carde, Ruisseau de Blagousse, Ruisseau Osime and Ruisseau Onésime. By error of localization, it was named Ruisseau du Seigneur. Rivière de la Pointe and Rivière de la Pointe des Éboulements are two other variants of the official name.[2]
The toponym "Rivière des Boudreault" was formalized on August 17, 1978, at the Place Names Bank of the Commission de toponymie du Québec.[3]