Lac Gnomon is a Lake located in Réservoir-Dozois; Vallée-de-l'Or, Quebec and has an elevation of 366 meters.

• Latitude: 47° 25' 23'' North   (decimal: 47.4230556)
• Longitude: 76° 47' 45'' West   (decimal: -76.7958333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 366 meters
• Location: Réservoir-Dozois; Vallée-de-l'Or
• Atlas of Canada Locator Map: Lac Gnomon
• GPS Coordinate Locator Map: Lac Gnomon Lat/Long