did the former trail have any extensions?
Pinhoti National Recreation Trail in Alabama and Georgia, which terminates at Flagg Mountain, was connected to the southern terminus of the Appalachian Trail via the Benton MacKaye Trail.
Appalachian Trail
 In 2008, the Pinhoti National Recreation Trail in Alabama and Georgia, which terminates at Flagg Mountain, was connected to the southern terminus of the Appalachian Trail via the Benton MacKaye Trail.
where does the appalachian trail start and where does it end It is a extension running northeast from Maine into New Brunswick and Quebec's Gaspé Peninsula, where it ends at Forillon National Park. what is this trail about? It is a marked hiking trail in the Eastern United States extending between Springer Mountain in Georgia and Mount Katahdin in Maine. who discovered this trail? Benton MacKaye what was his profession? He was an American forester, planner and conservationist. has he discovered any other trail apart from the former one? "The Pinhoti Trail is considered the realization of forester Benton MacKaye's original 1921 vision of a trail extending the length of the Appalachian Mountain chain, connecting several existing trails, and sprinkled with permanent camps and constructed to "stimulate every line of outdoor non-industrial endeavor," including recreation, recuperation, agriculture and study.
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Appalachian Trail [SEP] Extensions
The Appalachian Approach Trail begins at Amicalola Falls State Park's visitor center and ends at Springer Mountain. Because Springer Mountain is in a remote area, the Approach Trail is often the beginning of North bound thru-hike attempts. Much of the Approach Trail was originally built as part of the Appalachian Trail, before the southern terminus was relocated from Mount Oglethorpe to Springer Mountain.