Its 5 million steps follow the Appalachian Mountains from Mount Springer , Georgia , to Mount Katahdin , Maine . At 4,500 kilometers , Nepal 's Great Northern Trail is the longest and highest hiking trail in the world . The Grand Italian Trail took considerable planning and roughly eight months to complete . Only 200 people continue to thru - hike the Great Divide Trail each year .
At 4,500 kilometers , Nepal 's Great Northern Trail is the longest and highest hiking trail in the world . The Grand Italian Trail took considerable planning and roughly eight months to complete . Only 200 people continue to thru - hike the Great Divide Trail each year .