Mount Washington Cruises offers Scenic Cruises and Sunset Dinner Dance Cruises on Lake Winnipesaukee, New Hampshire’s largest lake. Located at the foothills of the White Mountains and surrounded by mountain ranges, Winnipesaukee contains more than islands and covers 44, acres of crystal clear water. Laconia is a city in Belknap County, New Hampshire, United States. The population was 15, at the census. It is the county seat of Belknap County. Laconia, situated near Lake Winnipesaukee, includes the villages of Lakeport and Weirs Beach. Each June for nine days beginning on the Saturday of. Overlooking Lake Winnipesaukee in the scenic Lakes Region of New Hampshire, the Birch Knoll Motel offers the finest in Modern, Comfortable, Air-Conditioned accommodations and guest facilities at an affordable price.