Lac Trosby is a Lake located in Saint-Zénon; Matawinie, Quebec and has an elevation of 577 meters.

• Latitude: 46° 28' 8'' North   (decimal: 46.4689265)
• Longitude: 73° 46' 13'' West   (decimal: -73.7701441)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 577 meters
• Location: Saint-Zénon; Matawinie
• Atlas of Canada Locator Map: Lac Trosby
• GPS Coordinate Locator Map: Lac Trosby Lat/Long