Lac Bostonnais is a Lake located in Lac-Masketsi; Mékinac, Quebec.

• Latitude: 47° 7' 9'' North   (decimal: 47.1191667)
• Longitude: 72° 26' 1'' West   (decimal: -72.4336111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Masketsi; Mékinac
• GPS Coordinate Locator Map: Lac Bostonnais Lat/Long