Lac Montesson is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 515 meters.

• Latitude: 54° 59' 26'' North   (decimal: 54.9905556)
• Longitude: 70° 6' 7'' West   (decimal: -70.1019444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 515 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Montesson
• GPS Coordinate Locator Map: Lac Montesson Lat/Long