Lac Courte Oreilles is the largest natural lake in Sawyer County and the 8th largest natural lake in Wisconsin. Grindstone Lake is located just north of Lac Courte Oreilles and is known for its abundant structure and trophy smallmouth bass. Featured Species: Walleye, Northern Pike, Smallmouth Bass, Muskie, Perch, Bluegill and Crappie Map Features: Lake Profile Fishery Information Fishing Tips and Techniques Accesses with Driving Directions Proven Fishing Areas Marked