4,077-acre 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. The northern end of the lake is undeveloped. The lake is also part of the 740-mile Northern Forest Canoe Trail, which begins in Old Forge, NY and ends in Fort Kent, ME.