At present the trail, which is maintained almost exclusively by Carantouan is a lovely, winding three-quarter-mile out and back path that leads to the cistern of the Carantouan Springs PA Rt. 220 in Waverly, NY. The original path lead up the Chemung Valley past the Indian Communities at Kanawohalla (Elmire, New York), Assinisink (Corning, New York) and Painted Post to Secaughcung at the head waters of a tributary of the Chemung know as the Canisteo River. The path continued past many Iroquous villages and followed the rivers connected the Cheapecke Bay to the Great Lakes and the Ohio Valley. Journey on the Forbidden Path (Sept 1760)
Chemung County, New York was located along the Forbidden Trail and has much to tell.
Another great map and detail of the path can be found at forbidden_path