Lol, so inside the Park will be a highway now ....... Except its not the real highline route. Paul Petzolt created that one.....
In 2013 we followed most of it here:
https://backcountrypost.com/threads/teton-highline-trail-the-long-way.1919/.
The route: Petzoldt's High Adventure Trail traverses the Teton Range for 67.5 miles, linking existing trails and involving short sections of sometimes-difficult cross-country travel. It runs from WY 22 west of Jackson north to the Lake of the Woods on Reclamation Road to Phillips Pass Trail on Teton Pass Road (WY 22)
I have the gpx track if anyone wants it....