| Lac à Mars | |
| Pushpin Map: | Quebec |
| Pushpin Map Caption: | Location in Quebec |
| Location: | Lac-Pikauba |
| Coords: | 47.8125°N -71.0339°W |
| Lake Type: | Natural |
| Inflow: | Sept petits ruisseaux riverains dont la décharge du lac Moche. |
| Outflow: | Rivière à Mars North-West |
| Basin Countries: | Canada |
| Length: | 2.3km (01.4miles) |
| Width: | 0.8km (00.5miles) |
| Area: | NaNkm2 |
| Depth: | NaNm (-2,147,483,648feet) |
| Max-Depth: | NaNm (-2,147,483,648feet) |
| Elevation: | 858m (2,815feet) |
The lac à Mars is a fresh body of water in the watershed of the rivière à Mars North-West, the rivière à Mars and the Saguenay River. This body of water is located in the unorganized territory of Lac-Pikauba, in the Charlevoix Regional County Municipality, in the administrative region of Saguenay–Lac-Saint-Jean, in the province of Quebec, in Canada. Lac à Mars is located in the central eastern part of the Laurentides Wildlife Reserve.
Upstream of the port, industrial and urban area, the rivière à Mars valley is mainly served by the Consol Paper road. The rivière à Mars North-West is served by a few other secondary forest roads for forestry and recreational tourism activities.[1]
Forestry is the main economic activity in the sector; recreational tourism, second.
The surface of the lac à March is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally made from mid-December to mid-March.
The mouth of Lac à Mars is located about 11.5km (07.1miles) northeast of the boundary of the administrative regions of Saguenay–Lac-Saint-Jean and Capitale-Nationale. The main watersheds near Lake Mars are:
Lac à Mars has a length of 2.3km (01.4miles) in the shape of a woman's head seen in semi-profile, a maximum width of 0.8km (00.5miles), an altitude is 858km (533miles) and an area of NaNkm2. This lake has a narrow bay stretching 0.17km (00.11miles) to the east. It also has a narrowing to 0.34km (00.21miles) in its southern part. A peninsula attached to the eastern shore stretching on 0.15km (00.09miles) in the shape of a hook causes another narrowing in the northern part of the lake. The mouth of this lake is located at the bottom of a bay on the north shore, at:
From the confluence of the lac à Mars, the current descends the course of:
The place names “Rivière à Mars”, “Rivière à Mars Nord-Ouest” and “Lac à Mars” have the same origin.
The toponym "lac à Mars" was formalized on December 5, 1968, by the Commission de toponymie du Québec.[3]