Mt St. Elias is a mountain on the border of Canada and Alaska. I believe it has the fastest relief from sea level of any mountain in the world.
I've read somewhere that it has a higher mortality rate than Everest. That makes sense to me since Everest is so well traveled and there is the help of sherpa teams whilst climbing. Elias is very remote and if you fall or run out of food, there aren't people that can find you. I don't have a source for my very specific mortality rate of 'higher than everest' and I was wondering if anyone else did. :P