Lac Orpen is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 391 meters.

• Latitude: 46° 38' 37'' North   (decimal: 46.6436111)
• Longitude: 76° 40' 19'' West   (decimal: -76.6719444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 391 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Orpen
• GPS Coordinate Locator Map: Lac Orpen Lat/Long