Lac à la Souris is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec.

• Latitude: 46° 48' 18'' North   (decimal: 46.805)
• Longitude: 76° 34' 54'' West   (decimal: -76.5816667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac à la Souris
• GPS Coordinate Locator Map: Lac à la Souris Lat/Long