Lac Tranquille is a Lake located in Gros-Mécatina; Basse-Côte-Nord, Quebec and has an elevation of 68 meters.

• Latitude: 50° 58' 15'' North   (decimal: 50.9708933)
• Longitude: 59° 6' 37'' West   (decimal: -59.1102367)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 68 meters
• Location: Gros-Mécatina; Basse-Côte-Nord
• Atlas of Canada Locator Map: Lac Tranquille
• GPS Coordinate Locator Map: Lac Tranquille Lat/Long