Blackwater Lake is a 722-acre lake with a maximum depth of 67 feet and is located six miles southwest of Longville. Blackwater Lake is generally clear and deep, with hard water and irregular shorelines. Approximately 47% of the lake is 15 feet or less in depth. There is a DNR public access with a concrete ramp on the north shore of the east bay off of County Road 11. Blackwater Lake provides fishing for northern pike, walleye, bluegill, black crappie, largemouth bass, and smallmouth bass. The lake is managed primarily for northern pike, largemouth bass, and walleye. Visit the DNR Lake Finder page for lake surveys, depth maps, lake water quality data, lake water clarity data, lake fish census, and lake stocking reports.