Hikinginthesmokyscom is the most comprehensive site on the internet for hiking trail information in the great smoky mountains we provide detailed information on more than 70 hikes in great smoky mountains national park including trail descriptions photographs key features difficulty ratings maps and elevation profiles. 3 of 69 outdoor activities in great smoky mountains national park the alum cave trail is basically a 2 part trail the first half a milder 23 mile hike to the alum cave overhang and the 2nd part a strenuous continuation of the remaining 32 miles to the summit of mt leconte. With over 850 miles of trails great smoky mountains national park offers many extraordinary hikes that reward you with expansive views old growth forests wildflowers meadows waterfalls and more there is truly something for everyone in this diverse national park. Alum cave alum cave is a pretty popular trail for hiking in the great smoky mountains if you are just hiking to alum cave the roundtrip length is 44 miles this trail is also used to get to the summit of mount leconte and if you decide to hike that part of the trail it is 105 miles roundtrip