Take the boat from Stonington, at the southern end of ME 15 on the coast of central Maine. For ferry information, contact (207) 367-5193 or www.isleauhaut.com.
Late spring through early fall.
New England Hiking: The Complete Guide to Nearly 400 Of The Best Hikes in New England, by Michael Lanza (Foghorn Press, 800-788-3123; $18.95). Acadia National Park, Mt. Desert Island, Isle au Haut Map #212 (Trails Illustrated, 800-962-1643; $18.95).
Acadia National Park, (207) 288-3338; www.nps.gov./acad/.