in one of my patented feverish google sessions looking into the history of trail building in the sierra nevada, i came across this year-old documentary about the building of the high sierra trail.
https://www.youtube.com/watch?v=6jgiU6Kq1nI
walking the HST last fall, i was overwhelmed by the skill and labor that must have gone into carving out a trail through the granite between bearpaw and precipice lake. and it turns out (at least according to this film) that section may be the high point in american trail building history. worth a look for the curious.