He disappeared while attempting to climb Denali in the winter .
For example , he was the first man ever to reach the North Pole solo , the first man ever to raft the Amazon solo , and the first man ever to climb Denali solo .
man disappeared while attempting to climb Denali in the winter .
For example , he was the first man ever to reach the North Pole solo , the first man ever to raft the Amazon solo , and the first man ever to climb Denali solo .