Lac Boom is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec and has an elevation of 724 meters.

• Latitude: 48° 54' 59'' North   (decimal: 48.9163889)
• Longitude: 70° 47' 21'' West   (decimal: -70.7891667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 724 meters
• Location: Mont-Valin; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Lac Boom Lat/Long