Lac à Mariette is a Lake located in Lamarche; Lac-Saint-Jean-Est, Quebec and has an elevation of 274 meters.

• Latitude: 48° 48' 26'' North   (decimal: 48.8072222)
• Longitude: 71° 27' 47'' West   (decimal: -71.4630556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 274 meters
• Location: Lamarche; Lac-Saint-Jean-Est
• Atlas of Canada Locator Map: Lac à Mariette
• GPS Coordinate Locator Map: Lac à Mariette Lat/Long