What if you are stuck in the wilderness or between a vast amount of open space and you have to walk on foot 500 to 1,000 miles? Could you do it without dying and collapsing? Could you travel on foot 25-50 miles a day until you completed your journey?
Well, there are some serious athletes who could, but could you? What if it were a matter of life and death, then what? Would you give up and become road kill or insect food, renewing and recycling to nature.
Well, it just so happens that you could make it to civilization and safety, yes, you could do it, you could survive and no you would not die if you focus your energies on moving, staying warm and paying attention. Perhaps you have watched those survival shows on TV, well surviving is one thing, but traveling 30, 40 or even 50 miles a day whether on the flat or through rugged terrain is completely possible.
How can a human do this? Simple, we are genetically made for upright walking long distances through any adversity; rain, snow, heat or cold. It's true, and the largest part is about your mindset. Yes, it really is in your mind. Now you can walk 10-15 miles without too much problem. Yes, blisters if you are not use to it and a bit of soreness.
But as long as you do not stop and constantly keep your muscles stretched you can do this. You need to break your walking up with 3 different periods of 10-15 miles each. Once in the morning, once in the evening and once in the middle of the day; each time stopping to eat and stretch during. You can do this, I know you can.