She died just off the Star Lake Trail, having ascended to the ridge via the Valley Way, which hits the ridge line at Madison Hut (4800', or much lower than the summit of Washington at 6288'). My partner and I have bailed off pretty much exactly her route in the summer when the winds were too high for our experience and fitness levels when we popped up out of the lee side of the ridge line on Adams.
Anybody who wants a really well researched case study should read Ty Gagne's book on her trip and the subsequent rescue attempt.
Incidentally, my partner and I climbed Washington on a guided trip the weekend after she died. The weather was so good the guides had their cameras out to take pictures. The extremes in the Presidentials are no joke, as stated, but can also result in some beautiful days.