Deuxième lac Inconnu is a Lake located in Saint-Guillaume-Nord; Matawinie, Quebec and has an elevation of 552 meters.

• Latitude: 46° 25' 48'' North   (decimal: 46.4300412)
• Longitude: 74° 6' 29'' West   (decimal: -74.1079347)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 552 meters
• Location: Saint-Guillaume-Nord; Matawinie
• Atlas of Canada Locator Map: Deuxième lac Inconnu
• GPS Coordinate Locator Map: Deuxième lac Inconnu Lat/Long