Lake, east-central New Hampshire, U.S. New Hampshire's largest lake, it covers an area of 71 sq mi (184 sq km) and is 20 mi (32 km) long by 12 mi (19 km) wide.
It is dotted with 274 islands. Its outlet, the Winnipesaukee River, flows about 20 mi (32 km) southwest to enter the Merrimack River . It is a popular summer recreation area.