Lac Pentuk is a Lake located in Lac-au-Brochet; La Haute-Côte-Nord, Quebec and has an elevation of 489 meters.

• Latitude: 49° 30' 0'' North   (decimal: 49.5)
• Longitude: 69° 46' 52'' West   (decimal: -69.7811111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 489 meters
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac Pentuk
• GPS Coordinate Locator Map: Lac Pentuk Lat/Long