| Rivière des Martres | |
| 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 and Charlevoix-Est |
| Subdivision Type5: | Municipalities |
| Subdivision Name5: | Lac-Pikauba and Mont-Élie |
| Length: | 15.8km (09.8miles) |
| Source1: | Lac des Loutres |
| Source1 Location: | Lac-Pikauba |
| Source1 Coordinates: | 47.7134°N -70.9948°W |
| Source1 Elevation: | 596m (1,955feet) |
| Mouth: | Malbaie River |
| Mouth Location: | Mont-Élie |
| Mouth Coordinates: | 47.8694°N -70.4867°W |
| Mouth Elevation: | 240m (790feet) |
| Tributaries Left: | (Upstreem from the mouth) . |
| Tributaries Right: | (Upstream from the mouth) . |
The rivière des Martres (English: Martens' River) is a tributary of the west bank of the intermediate part of the Malbaie River, flowing in the administrative region of Capitale-Nationale, in the province from Quebec, in Canada. This watercourse crosses the regional county municipalities of:
This watercourse crosses the Hautes-Gorges-de-la-Rivière-Malbaie National Park.
The upper part of this valley is served by a secondary forest road connecting west to the valley of the upper Malbaie river. The lower part does not have roads suitable for motor vehicles due to the mountainous terrain. Recreational and tourist activities constitute the main economic activities in this valley in the park area; forestry, second (in the Laurentides wildlife reserve, the upper part of the valley).
Because of the altitude, the surface of the Martres River is generally frozen from the end of November until the beginning of April; however, safe circulation on the ice is generally from the beginning of December until the end of March. The water level of the river varies with the seasons and the precipitation; the spring flood generally occurs in April.
The Martres river rises from the Lac de la Loutre (length: ; altitude:) landlocked between the mountains, located in a forest area in the territory not organized from Lac-Pikauba. The mouth of this small lake is located to the southwest, at:
From its source, the course of the Martres river descends on in an increasingly steep valley with high cliffs, with a drop of, according to the following segments:
The Martres river flows in a bend on the west bank of the Malbaie river, in the unorganized territory of Lac-Pikauba, in the Hautes-Gorges-de-la-Rivière-Malbaie National Park. This mouth is located at:
From the mouth of the Martres river, the current descends over, following the course of the Malbaie river which flows to La Malbaie in the St. Lawrence River.[1]
This toponym has been known since at least the 1920s. It is named after the American marten, carnivorous mammal of the Mustelidae family, whose fur was much sought after. Since the mid-20th century, due to intensive logging and the increase in the acidity rate of lakes, this mammal has become rarer in this sector.[2]
The toponym "Rivière des Martres" was formalized on December 5, 1968, by the Commission de toponymie du Québec.[3]