Lac Montsec is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 246 meters.

• Latitude: 48° 50' 00'' North   (decimal: 48.8333333)
• Longitude: 72° 45' 46'' West   (decimal: -72.7627778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 246 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac Montsec
• GPS Coordinate Locator Map: Lac Montsec Lat/Long