BACKPACK LOOPS Map & Guide by Great Smoky Mountains Natural History Association. This full color, pocket guide details 12 of the best overnight loop hikes for backpackers. The map side shows the routes of all 12, complete with backcountry campsites and connecting trails. The text side describes each route and includes elevation charts to show how much up and down each loop involves. One, two and three night loop hikes are included. A bargain at twice the price. All Purchases Benefit the Park!