Lac à Tentacule is a Lake located in Rivière-Mouchalagane; Caniapiscau, Quebec.

• Latitude: 51° 35' 57'' North   (decimal: 51.5992078)
• Longitude: 69° 16' 54'' West   (decimal: -69.2816483)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mouchalagane; Caniapiscau
• Atlas of Canada Locator Map: Lac à Tentacule
• GPS Coordinate Locator Map: Lac à Tentacule Lat/Long