Lac Illat is a Lake located in Saint-Gabriel-de-Valcartier; La Jacques-Cartier, Quebec.

• Latitude: 47° 4' 4'' North   (decimal: 47.0677988)
• Longitude: 71° 34' 23'' West   (decimal: -71.5731521)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saint-Gabriel-de-Valcartier; La Jacques-Cartier
• Atlas of Canada Locator Map: Lac Illat
• GPS Coordinate Locator Map: Lac Illat Lat/Long