Stonington, at the tip of Deer Isle, is a working, lobstering town. Its name derives from its granite quarries, also providing employment. Sixty percent of Isle au Haut is part of Acadia National Park (the largest part of the park is on Mt. Desert Island), accessible by ferry from Stonington. We hiked about 8 miles on Isle au Haut, from the town dock to the south end of the island and then to Duck Harbor, along trails through forest and along rocky cliffs and shores.