La Montagnaise is a Island located in Longue-Pointe-de-Mingan; Minganie, Quebec.

• Latitude: 50° 12' 10'' North   (decimal: 50.2027777)
• Longitude: 64° 7' 3'' West   (decimal: -64.1175000)
• Topography Feature Category: Island
• Geographical Feature: Rocher
• Canadian Province/Territory: Quebec
• Location: Longue-Pointe-de-Mingan; Minganie
• Atlas of Canada Locator Map: La Montagnaise
• GPS Coordinate Locator Map: La Montagnaise Lat/Long