Lac Mabretou is a Lake located in Petit-Mécatina; Minganie, Quebec.

• Latitude: 52° 16' 21'' North   (decimal: 52.2725)
• Longitude: 61° 38' 5'' West   (decimal: -61.6347222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Petit-Mécatina; Minganie
• Atlas of Canada Locator Map: Lac Mabretou
• GPS Coordinate Locator Map: Lac Mabretou Lat/Long