We more or less followed https://www.alltrails.com/en-gb/trail/us/north-carolina/jacob-branch-lo… but the problem with the All Trails route is that it starts at a camp ground which does not make a lot of sense for those not camping.

I started my GPS on the side of the bridge where I ended, but apparent it did not pick up until after I crossed the bridge, so I guess that is not the official start of the route.

Start at Brookyln Bridge on the Manhattan side and finish at the end of the GW bridge on the New Jersey side as fast as possible, but have to cross all of Manhattan's bridges in the process. There are 17 bridges with pedestrian paths and this route cross all of them, there are a few train / car only ones that were excluded. 

The Gibb River Road is touted as one of Australia’s toughest 4WD tracks. Located in the Kimberley region of Western Australia this is an isolated and exposed gravel track with corrugations, undulating terrain and wild country.

It is important to note that Steve White successfully ran the track in 2000 prior to the route being acknowledged as runnable.