0) Her mileage to the top of Madison was off by about a mile on her written plan. Not a good place to start for an ambitious day.

1) Most of her prior experience was guided where somebody else was responsible for making the decisions. I am fully prepared to believe that she had the physical experience, but would suspect that she lacked the decision-making experience that would have saved her.

2) She died heartbreakingly close to Madison Hut. If she'd turned around 30 to 60 minutes earlier, she might have made it to the relative shelter of the hut with enough energy left to warm up and get back below treeline on the Valley Way, which is quite close to the hut. Speculation, I know, but I can't help but wonder.

We talked a lot about the decision-making because we could both see ourselves having a go in the same circumstances owing to our inexperience (we independently thru-hiked the AT, but we aren't mountaineers). Reading it was a really useful case study for us and helped think through identifying when we're about to cross the line from adventure to peril.

If you didn't know, he's got a second book out, btw. Gonna crack it open next :-)