Lac Holnon is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 427 meters.

• Latitude: 49° 0' 20'' North   (decimal: 49.0055556)
• Longitude: 74° 5' 27'' West   (decimal: -74.0908333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 427 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac Holnon
• GPS Coordinate Locator Map: Lac Holnon Lat/Long