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

• Latitude: 48° 55' 16'' North   (decimal: 48.9211421)
• Longitude: 69° 26' 30'' West   (decimal: -69.4417227)
• 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 Tercis
• GPS Coordinate Locator Map: Lac Tercis Lat/Long