The Great Western Loop was the exact challenge I was looking for - the longest possible continual thru-hike. Although largely self-supported, there were places where hitching to obtain a resupply were necessary. During the route I completed Nolans 14 in less than 60 hours, was charged by a grizzly, ran out of food more times than I can count, and completed a 60 mile waterless stretch. Adapting to a new style surely doesn't take 208 days, but by the time I finished, all I was good at was hiking 33 miles per day, every day. Full blog can be found here.
208d 15h 0m 0s