Lac Marianne is a Lake located in Lac-au-Brochet; La Haute-Côte-Nord, Quebec.

• Latitude: 48° 41' 32'' North   (decimal: 48.6922514)
• Longitude: 69° 56' 8'' West   (decimal: -69.9356153)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• GPS Coordinate Locator Map: Lac Marianne Lat/Long