Lac à Thérien is a Lake located in Sainte-Apolline-de-Patton; Montmagny, Quebec and has an elevation of 500 meters.

• Latitude: 46° 49' 39'' North   (decimal: 46.8275000)
• Longitude: 70° 14' 35'' West   (decimal: -70.2430555)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 500 meters
• Location: Sainte-Apolline-de-Patton; Montmagny
• Atlas of Canada Locator Map: Lac à Thérien
• GPS Coordinate Locator Map: Lac à Thérien Lat/Long