Lac Dumas is a Lake located in Saint-Côme¿Linière; Beauce-Sartigan, Quebec and has an elevation of 385 meters.

• Latitude: 46° 0' 7'' North   (decimal: 46.0019444)
• Longitude: 70° 32' 30'' West   (decimal: -70.5416666)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 385 meters
• Location: Saint-Côme¿Linière; Beauce-Sartigan
• Atlas of Canada Locator Map: Lac Dumas
• GPS Coordinate Locator Map: Lac Dumas Lat/Long