The 230-foot MS Mount Washington offers 2½-hour scenic cruises of Lake Winnipesaukee, departing from Weirs Beach and stopping in Wolfeboro, Alton Bay, Center Harbor, and Meredith (you can board at any of these stops). Evening cruises include live music and a buffet dinner, and the Sunday Champagne brunch cruise includes plenty of bubbly. The same company operates the MV Sophie C. ($26), which has been the area's floating post office for more than a century.
The boat departs from Weirs Beach with mail and passengers and passes through parts of the lake not accessible by larger ships. The MV Doris E. ($18) has one- and two-hour scenic cruises of Meredith Bay throughout the summer.