Lac Ternas is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 365 meters.

• Latitude: 47° 16' 5'' North   (decimal: 47.2680556)
• Longitude: 77° 39' 32'' West   (decimal: -77.6588889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 365 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Ternas
• GPS Coordinate Locator Map: Lac Ternas Lat/Long