Lac des Deux Montagnes is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 49° 6' 10'' North   (decimal: 49.1027999)
• Longitude: 78° 55' 53'' West   (decimal: -78.9313999)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• GPS Coordinate Locator Map: Lac des Deux Montagnes Lat/Long