Lac Dumais is a Lake located in Lac-Pikauba; Charlevoix, Quebec and has an elevation of 882 meters.

• Latitude: 47° 53' 26'' North   (decimal: 47.8905556)
• Longitude: 71° 13' 41'' West   (decimal: -71.2280556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 882 meters
• Location: Lac-Pikauba; Charlevoix
• Atlas of Canada Locator Map: Lac Dumais
• GPS Coordinate Locator Map: Lac Dumais Lat/Long