Lac de la Lettre is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 573 meters.

• Latitude: 48° 43' 22'' North   (decimal: 48.7227778)
• Longitude: 73° 26' 48'' West   (decimal: -73.4466667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 573 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac de la Lettre
• GPS Coordinate Locator Map: Lac de la Lettre Lat/Long