Grand Lake St. Marys, Ohio's largest inland lake, is the gateway to fishing, boating, swimming, biking and camping. Over 13,500 acres of surface water await the ardent angler. Excellent catches of crappie, catfish, bass, bluegill, as well as yellow perch in the winter are found in the lake. Boats with unlimited horsepower are permitted on the lake. Five state operated launch ramps also exist along the shallow shoreline. Fuel, boat rentals and seasonal dock rentals are available.