Lac Chastenay is a Lake located in Rivière-Koksoak; Kativik, Quebec.

• Latitude: 55° 8' 51'' North   (decimal: 55.1475)
• Longitude: 70° 9' 53'' West   (decimal: -70.1647222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Koksoak; Kativik
• Atlas of Canada Locator Map: Lac Chastenay
• GPS Coordinate Locator Map: Lac Chastenay Lat/Long