Lac Long is a Lake located in Lac-Nilgaut; Pontiac, Quebec.

• Latitude: 46° 10' 49'' North   (decimal: 46.1802778)
• Longitude: 76° 50' 50'' West   (decimal: -76.8472222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Nilgaut; Pontiac
• GPS Coordinate Locator Map: Lac Long Lat/Long