Lac Buck is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec.

• Latitude: 50° 12' 56'' North   (decimal: 50.2155556)
• Longitude: 72° 30' 40'' West   (decimal: -72.5111111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Buck
• GPS Coordinate Locator Map: Lac Buck Lat/Long