Upper Grindstone Brook is a River located in Restigouche, New Brunswick and has an elevation of 228 meters.

• Latitude: 47° 52' 11'' North   (decimal: 47.8697447)
• Longitude: 67° 13' 1'' West   (decimal: -67.2169480)
• Topography Feature Category: River
• Geographical Feature: Brook
• Canadian Province/Territory: New Brunswick
• Elevation: 228 meters
• Location: Restigouche
• Atlas of Canada Locator Map: Upper Grindstone Brook
• GPS Coordinate Locator Map: Upper Grindstone Brook Lat/Long