Grindstone Lake is a large freshwater lake located in north central Wisconsin in the Town of Bass Lake, Sawyer County, United States, in township 40 north, ranges 8 and 9 west. The lake is roughly oval shaped being approximately three miles in length east to west and two miles (3 km) north to south. Grindstone Lake is 3,176 acres (12.85 km2) in size (including islands) with a maximum depth of 60 feet (18 m) and a shoreline of 10.5 miles (16.9 km). The lake has a small inlet stream (Grindstone Creek) that enters on the east shore of the lake and that originates from a series of springs (Upper Grindstone, Grindstone, Graveyard, and Lower Grindstone Springs) that are located a short distance northeast of the lake. There is an outlet on the southeast shore of the lake that leads through a smal