Lac des Roches is a Lake located in Saint-Marcel; L'Islet, Quebec and has an elevation of 470 meters.

• Latitude: 46° 56' 7'' North   (decimal: 46.9352778)
• Longitude: 70° 8' 14'' West   (decimal: -70.1372222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 470 meters
• Location: Saint-Marcel; L'Islet
• Atlas of Canada Locator Map: Lac des Roches
• GPS Coordinate Locator Map: Lac des Roches Lat/Long