Harvey, is there any particular altitude in which seemingly everyone experiences some sort of altitude sickness? I have done dayhikes in which I drove from sea level, hiked to 13k and experienced about 30 seconds of nausea, and no other symptoms. After a couple days of acclimatization, sleeping on Whitney summit was no problem either. I am just curious if there is a "ceiling" in which it seems that everyone starts getting some sort of illness.
As lazy and uncommitted as I am to most anything physical -- outside of running/skiing -- I am sure that I would never hike again if I experienced some of the described illnesses on this thread!
