Special 5th Edition. Over 100 revised pages. 2012. Covers all 150 official trails in Great Smoky Mountains National Park with in-depth narratives and invaluable profile charts that show mileage, elevation change, and major stream crossings at a glance. Includes information on all backcountry campsites, shelters, regulations and permit/reservation information. New edition includes Mountains-to-Sea Trail and handy pocket in the back cover to hold park map. Printed on special lightweight paper. Pocket-sized. 584 pages. Weighs only 11 ounces.