| Ruisseau du Lac au Lard | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Canada |
| Subdivision Type2: | Province |
| Subdivision Name2: | Quebec |
| Subdivision Type3: | Region |
| Subdivision Name3: | Mauricie |
| Subdivision Type4: | City |
| Subdivision Name4: | La Tuque |
| Length: | 1.9km (01.2miles) |
| Source1: | Lac au Lard |
| Source1 Location: | La Tuque |
| Source1 Coordinates: | 47.3341°N -72.3904°W |
| Source1 Elevation: | 321 |
| Mouth: | Jeannotte River |
| Mouth Location: | La Tuque |
| Mouth Coordinates: | 47.3472°N -72.3667°W |
| Mouth Elevation: | 320 m |
The Ruisseau du Lac au Lard stream is a tributary of the west bank of the Jeannotte River, flowing in the western hydrographic slope of the Batiscan River, in the territory of the city of La Tuque, in the administrative region of Mauricie, in Quebec, in Canada. This river crosses the zec de la Bessonne.
This hydrographic slope is served by the forest road R040, a bridge spanning the Lac au Lard stream, near its mouth.
Since the mid-19th century, forestry has been the predominant activity of the Lac au Lard stream watershed; recreational activities, second.[1]
The surface of the Lac au Lard stream (except the rapids areas) is generally frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally made from the end of December to the beginning of March. The water level of the river varies with the seasons and the precipitation.
The stream of the Rivière au Lard rises at the mouth of lac au Lard (length: ; altitude:). This forest lake is mainly fed to the northwest by the discharge of a set of lakes including Lac de la Grosse Roche and by the Doucet River (coming from the south).
The mouth of this lake is located North-West of the mouth of the confluence of the Jeannotte River with the Batiscan river.
From the mouth of Lac au Lard, the Lac au Lard stream flows for north-east, up to the confluence of the river. There are no tributaries.[2]
The Lac au Lard stream flows on the west bank of the Jeannotte river course. This confluence is located at:
From the mouth, the current descends on to the south then east the course of the Jeannotte river, and on the course of the river Batiscan towards the south which pours on the northwest bank of the St. Lawrence River.[2]
The toponym "Ruisseau du Lac au Lard" was formalized on December 5, 1968, at the Commission de toponymie du Québec.[3]