Lac Gachet is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 56° 5' 6'' North   (decimal: 56.085)
• Longitude: 67° 14' 56'' West   (decimal: -67.2488889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Gachet
• GPS Coordinate Locator Map: Lac Gachet Lat/Long