as I recall Galen Rowell died in a small plane crash on the way to his home in the eastern Sierra. They had moved from Berkeley a few years before. His wife was a pilot but I don't recall if she was piloting this plane.
I met Galen a couple of times. One of his stories was that he was going to Berkeley to be a physicist when he moved out into photograpy. Given the way he approached problems, I think Galen would have made a good physicist.