Hiker B wondered if the headache may have been due to a lack of caffeine.
No coffee? That explains everything.
Just kidding, not to make light of this. I'm not a doctor, and I don't play one on TV, but I bet one will weigh in on this (Harvey).
Seems to me there's a high percentage of people getting similar food poisoning symptoms at a wide range of elevations, but what do I know.
-- Hiker E
