Grindstone Brook is a River located in Northumberland, New Brunswick and has an elevation of 61 meters.

• Latitude: 46° 41' 47'' North   (decimal: 46.6963847)
• Longitude: 65° 58' 12'' West   (decimal: -65.9700007)
• Topography Feature Category: River
• Geographical Feature: Brook
• Canadian Province/Territory: New Brunswick
• Elevation: 61 meters
• Location: Northumberland
• Atlas of Canada Locator Map: Grindstone Brook
• GPS Coordinate Locator Map: Grindstone Brook Lat/Long