Meredith Quinlan submitted this route:

The route starts at the Northern-most Lighthouse Hraunhafnartangi, which is metres off the Northern-most point in Iceland and travels through the wilderness finishing down at the Southern-most Light house, Dyrhólaey, also metres from the Southern-most point in Iceland. Its length is approx. 560 km. In principle this is an open course route from lighthouse to light house but we have a variation that follows the East-coast which is much longer.

Established by EriK Schlimmer in 2013, the Trans Adirondack Route is a primitive pathway that traverses New York State’s Adirondack Park, the largest State Park and forest preserve in the Lower Forty-Eight. Running 239.4 miles, few footpaths in the Northeast are longer, and none are wilder.