Lac Marnet is a Lake located in Lac-Walker; Sept-Rivières, Quebec.

• Latitude: 50° 37' 14'' North   (decimal: 50.6205556)
• Longitude: 67° 29' 4'' West   (decimal: -67.4844444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac Marnet
• GPS Coordinate Locator Map: Lac Marnet Lat/Long