1. Appalachian Trail
Long treks don’t come much more famous than the Appalachian Trail. The trail between Springer Mountain (Georgia) and Mount Katahdin (Maine) passes through a whopping 14 states and covers around 3,500km, making it one of the longest walking-only trails on the planet. Undertaking the whole thing is one heck of a task, although more than two million walkers take in part of it annually. Immortalised in Bill Bryson’s ‘A Walk in the Wood’, the Appalachian Trail is the big daddy of American treks.