Lac Martineau is a Lake located in Sagard; Charlevoix-Est, Quebec and has an elevation of 353 meters.

• Latitude: 48° 5' 24'' North   (decimal: 48.0900244)
• Longitude: 70° 6' 43'' West   (decimal: -70.1120083)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 353 meters
• Location: Sagard; Charlevoix-Est
• Atlas of Canada Locator Map: Lac Martineau
• GPS Coordinate Locator Map: Lac Martineau Lat/Long