Lac Tshiashk is a Lake located in Rivière-Mouchalagane; Caniapiscau, Quebec and has an elevation of 546 meters.

• Latitude: 51° 35' 17'' North   (decimal: 51.5880556)
• Longitude: 69° 53' 39'' West   (decimal: -69.8941667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 546 meters
• Location: Rivière-Mouchalagane; Caniapiscau
• Atlas of Canada Locator Map: Lac Tshiashk
• GPS Coordinate Locator Map: Lac Tshiashk Lat/Long