> Honestly sounds like bullshit.

Why’s that? There are lots of people who do extreme amounts of activity. Parent’s description is on par for backpacking.

Please consider your phrasing. Nothing wrong with asking the question, but best avoid coming off as though you’re accusing people of lying. https://news.ycombinator.com/newsguidelines.html

Sounds reasonable to me. 20/25 K's is 15 miles or so. 20 minute miles is a totally comfortable pace. - so 300/60 5 hours. Plus add whatever and you get to 8 or 9 hours of walking.

I wouldn't want to do that if it was really hot but other then that it doesn't seem particularly bad much less unlikely.

I think he can do 30-40km a day on his day off not that he is doing it every day :)

5-6am to sundown.