Lac Sainte-Marthe is a Lake located in La Martre; La Haute-Gaspésie, Quebec and has an elevation of 623 meters.

• Latitude: 49° 5' 26'' North   (decimal: 49.0906006)
• Longitude: 66° 13' 32'' West   (decimal: -66.2255079)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 623 meters
• Location: La Martre; La Haute-Gaspésie
• Atlas of Canada Locator Map: Lac Sainte-Marthe
• GPS Coordinate Locator Map: Lac Sainte-Marthe Lat/Long