Lac Mars is a Lake located in Lac-au-Brochet; La Haute-Côte-Nord, Quebec.

• Latitude: 48° 49' 44'' North   (decimal: 48.8289194)
• Longitude: 69° 12' 22'' West   (decimal: -69.2061630)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac Mars
• GPS Coordinate Locator Map: Lac Mars Lat/Long