Mont Third Back Bone is a Mountain located in Petit-Mécatina; Minganie, Quebec.

• Latitude: 51° 46' 43'' North   (decimal: 51.7786632)
• Longitude: 57° 28' 57'' West   (decimal: -57.4823995)
• Topography Feature Category: Mountain
• Geographical Feature: Mont
• Canadian Province/Territory: Quebec
• Location: Petit-Mécatina; Minganie
• Atlas of Canada Locator Map: Mont Third Back Bone
• GPS Coordinate Locator Map: Mont Third Back Bone Lat/Long