Lac au Rat is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 273 meters.

• Latitude: 49° 48' 37'' North   (decimal: 49.8102777)
• Longitude: 78° 10' 18'' West   (decimal: -78.1716666)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 273 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac au Rat
• GPS Coordinate Locator Map: Lac au Rat Lat/Long