"Acadia prohibits pets near its lakes and natural water sources, as well as on rung and ladder trails along cliffs, but that still leaves 100 miles of hiking paths and 45 miles of crushed-stone carriage roads where Fido can roam freely. We recommend going for a stroll on the historic roadways that crisscross near Jordan Pond House or trekking up the backside of Champlain Mountain." - Travel + Leisure Editors