Lac Berthet is a Lake located in Rivière-Koksoak; Kativik, Quebec and has an elevation of 61 meters.

• Latitude: 58° 28' 9'' North   (decimal: 58.4691667)
• Longitude: 68° 29' 45'' West   (decimal: -68.4958333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 61 meters
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Berthet
• GPS Coordinate Locator Map: Lac Berthet Lat/Long