Lac Longepierre is a Lake located in Baie-James; Jamésie, Quebec.

• Latitude: 52° 46' 56'' North   (decimal: 52.7822222)
• Longitude: 74° 43' 4'' West   (decimal: -74.7177778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Longepierre
• GPS Coordinate Locator Map: Lac Longepierre Lat/Long