Lac Bonsoir is a Lake located in Baie-de-la-Bouteille; Matawinie, Quebec and has an elevation of 516 meters.

• Latitude: 46° 43' 32'' North   (decimal: 46.7255920)
• Longitude: 73° 35' 49'' West   (decimal: -73.5970823)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 516 meters
• Location: Baie-de-la-Bouteille; Matawinie
• Atlas of Canada Locator Map: Lac Bonsoir
• GPS Coordinate Locator Map: Lac Bonsoir Lat/Long