Mammoth Cave National Park preserves the cave system and a part of the Green River valley and hilly country of south central Kentucky. This is the world's longest known cave system, with more than 390 miles explored. The park is home to over 64 miles of trails ranging from nature trails to more advanced trails. <br />
Source: National Park Service
From the North: Take Interstate 65 to Exit 53 (Cave City Exit). Turn right onto KY-70. Follow 70/255 as it becomes the Mammoth Cave Parkway in the park. Follow the Mammoth Cave Parkway to the Visitor Center.<br /><br />From the South: Take Interstate 65 to Exit 48 (Park City Exit). Turn left onto KY-255 and follow 255 as it becomes the Park City Road into the park. Follow Park City Road until it joins the Mammoth Cave Parkway; turn left. Follow the Mammoth Cave Parkway to the Visitor Center.<br /><br />Source: National Park Service
http://www.tripleblaze.com/trail.php?c=3&i=2951