Long Island is a small island located in Casco Bay, a 45 minute ferry ride from Portland, Maine. The Casco Bay Lines ferry docks at Mariners Wharf, and the Historical Society museum is located a very short distance away in the Community Center (the large light yellow building with the flags in front of it) at 77 Wharf Street. The ferry schedule to Long Island may be found at the Casco Bay Ferry Lines website.
If you wish to purchase food, the Boathouse Beverage near the Community Center is a small grocery store. The Long Island Store on Island Avenue sells sandwiches, pizza and ice cream, as well as art work of the island. South Beach is a state owned public beach, and about a 30 minute walk from the wharf. Front Beach is also open to the public; access is via a staircase in front of the former VFW Hall.