"quadfather" posted this (note: it's important to give your actual name so we know who holds the FKT!)
I completed the Allegheny Front Trail 9/17//17, in a time of 12:03:19. I ran clockwise from the trailhead at PA RT504, solo & unsupported.
The tcx/gpx files of the route can be found here:
(If following them, take note that I got off course briefly three times)
It was unseasonable hot for this time of year & the day turned into a bit of a sufferfest: a significant amount of time can easily be taken off of what I was able to complete it in.