Lac Guillaumat is a Lake located in Baie-James; Jamésie, Quebec and has an elevation of 206 meters.

• Latitude: 53° 3' 51'' North   (decimal: 53.0641667)
• Longitude: 76° 43' 38'' West   (decimal: -76.7272222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 206 meters
• Location: Baie-James; Jamésie
• Atlas of Canada Locator Map: Lac Guillaumat
• GPS Coordinate Locator Map: Lac Guillaumat Lat/Long