Lac à Trefflé is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 303 meters.

• Latitude: 49° 19' 40'' North   (decimal: 49.3278144)
• Longitude: 72° 22' 58'' West   (decimal: -72.3828129)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 303 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac à Trefflé
• GPS Coordinate Locator Map: Lac à Trefflé Lat/Long