Lol, what are you, a comedian? He said average of 75 miles a day, that means 75 miles day in and day out with no off days. It can be done, but it is not easy, I know since I've done it. Especially in the area where they were, there are some brutal climbs and vicious winds. What are you comparing it to, the Pacific Coast Trail? I'm sorry, but that's a joke difficulty wise compared to Alaska or British Columbia