Lac à Pierre is a Lake located in Sainte-Apolline-de-Patton; Montmagny, Quebec.

• Latitude: 46° 45' 10'' North   (decimal: 46.7528031)
• Longitude: 70° 11' 8'' West   (decimal: -70.1856235)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Sainte-Apolline-de-Patton; Montmagny
• GPS Coordinate Locator Map: Lac à Pierre Lat/Long