Lac Opéra is a Lake located in Saint-Calixte; Montcalm, Quebec and has an elevation of 152 meters.

• Latitude: 45° 55' 6'' North   (decimal: 45.9183333)
• Longitude: 73° 49' 32'' West   (decimal: -73.8255555)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 152 meters
• Location: Saint-Calixte; Montcalm
• Atlas of Canada Locator Map: Lac Opéra
• GPS Coordinate Locator Map: Lac Opéra Lat/Long