Lac Marcoux is a Lake located in Lac-au-Brochet; La Haute-Côte-Nord, Quebec and has an elevation of 381 meters.

• Latitude: 49° 6' 15'' North   (decimal: 49.1042047)
• Longitude: 69° 20' 54'' West   (decimal: -69.3483916)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 381 meters
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac Marcoux
• GPS Coordinate Locator Map: Lac Marcoux Lat/Long