Lac Frontenac is a Lake located in Lac-Ernest; Antoine-Labelle, Quebec and has an elevation of 379 meters.

• Latitude: 46° 16' 56'' North   (decimal: 46.2822222)
• Longitude: 75° 22' 40'' West   (decimal: -75.3777778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 379 meters
• Location: Lac-Ernest; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Frontenac
• GPS Coordinate Locator Map: Lac Frontenac Lat/Long