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

• Latitude: 48° 52' 40'' North   (decimal: 48.8778089)
• Longitude: 69° 39' 3'' West   (decimal: -69.6508932)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-au-Brochet; La Haute-Côte-Nord
• Atlas of Canada Locator Map: Lac du Sial
• GPS Coordinate Locator Map: Lac du Sial Lat/Long