Mont O'Brien is a Mountain located in Alleyn-et-Cawood; Pontiac, Quebec and has an elevation of 311 meters.

• Latitude: 45° 53' 17'' North   (decimal: 45.8880556)
• Longitude: 76° 13' 45'' West   (decimal: -76.2291667)
• Topography Feature Category: Mountain
• Geographical Feature: Mont
• Canadian Province/Territory: Quebec
• Elevation: 311 meters
• Location: Alleyn-et-Cawood; Pontiac
• Atlas of Canada Locator Map: Mont O'Brien
• GPS Coordinate Locator Map: Mont O'Brien Lat/Long