Title says it all, here is the link:
https://appalachiantrail.org/explore/
I know the PCT and CDT are longer, but are they hiking only footpaths? I thought they were. Perhaps they are playing with commas, though there is no other such trail, so they would also be the shortest trail between MA and GE.
Full sentence quote: The Appalachian Trail is the longest hiking-only footpath in the world, ranging from Maine to Georgia.