Acadia's many foot trails, from lowland paths to mountain routes, suit the casual walker to the avid hiker. There are over 120 miles of hiking trails in Acadia National Park. Trails range from short, level surf walks to steep Precipice Trail. Connecting trails enable hardy hikers to scale several Acadia peaks in one trip.
Between 1915 and 1933, John D. Rockefeller, Jr., financed and directed the building of 57 miles of carriage roads. These carriage roads are a network of woodland roads free of motor vehicles, for hikers, bicyclists, horseback riders and carriages.
These trails are not rail-trails.
Parking and Trail Access
See this link -- http://www.acadia.national-park.com/map.htm -- for maps of the area.
"Take a few days, bring your mountain or hybrid bike, and check out the carriage trails. There's gorgeous scenery, terrific and fairly challenging rides and plenty of wildlife. Nearby Bar Harbor is great for some hip civilization, too."