The Appalachian Trail has a centerline trail which provides the coordinates (and more) for the entire AT. The geojson file is here: https://hub.arcgis.com/datasets/nps::appalachian-national-scenic-trail-official-centerline-04-07-2022/about
I cannot figure out how the trail segments are ordered within the geojson file as the object id does not correlate to south -> north or north -> south on the trail. The only thing I need from the file is the coordinates in trail order sequence.