Lac Porphyre is a Lake located in Murdochville; La Côte-de-Gaspé, Quebec and has an elevation of 692 meters.

• Latitude: 48° 59' 39'' North   (decimal: 48.9941666)
• Longitude: 65° 30' 57'' West   (decimal: -65.5158333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 692 meters
• Location: Murdochville; La Côte-de-Gaspé
• Atlas of Canada Locator Map: Lac Porphyre
• GPS Coordinate Locator Map: Lac Porphyre Lat/Long