Mount Whitney, California (more hikes!)
The tallest mountain in the continental United States, rising above 14,505 feet/4,421 meters tall. I did a horrible thing and attempted it without acclimating and had been awake for 60 hours due to work. I was unable to breathe properly, my fingers swelled and I felt dizzy and nauseated. A wise person would turn around, but I am stubborn. AMS can kill if it develops into high altitude pulmonary edema or high altitude cerebral edema so it is no joke. It is ideal to camp at near the portal for two days in advance, and try smaller hikes at higher elevations to adjust to the thinner air. REI writes 70% of Whitney attempts end in failure because people do not prepare properly. Somehow I made it! But please don’t do anything of the things I did because it is reckless, stupid and could easily end badly.