Long Lake is a 14-mile (23 km) lake in the town of Long Lake in Hamilton County, New York in the United States; the average width is half a mile. It is part of the Raquette River, which flows in a straight, northeast-trending valley. NY 30 crosses at a narrows 4 miles (6.4 km) from the south end where the hamlet of Long Lake is located. There are two public beaches and a state boat launch. More than half of the shoreline is part of the New York State Forest preserve.