Grindstone Lake is a Lake located in Muskoka, Ontario and has an elevation of 370 meters.

• Latitude: 45° 11' 49'' North   (decimal: 45.1969444)
• Longitude: 78° 52' 31'' West   (decimal: -78.8752777)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 370 meters
• Location: Muskoka
• Atlas of Canada Locator Map: Grindstone Lake
• GPS Coordinate Locator Map: Grindstone Lake Lat/Long