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National Geographic now has two separate Trails Illustrated Maps for the Great Smoky Mountains: in addition to the old map. National Geographic has divided the park into two sections, thus allowing each map to show much greater detail. The original map, which covered the entire Park, has a scale 1:70,000. The two new maps now have a scale of 1:40,000 (1 inch = 0.6 miles) and provide much greater detail such as backcountry campsites, footbridges, fords/stream crossings, nature/interpretive trails, as well as detailed trail mileages.
The map for the western section of the Park includes the Cades Cove, Elkmont and Lake Fontana areas. The map for the eastern section includes Clingmans Dome, Newfound Gap Road, Mt. LeConte, Deep Creek, Cataloochee, Big Creek and trails near Gatlinburg.
Of course you can still purchase the original map that includes the entire Park (see link above).