17+ Most Difficult Mountains To Climb In Us Background. Champlain mountain | acadia national park, maine acadia's most challenging climb, precipice trail, ascends champlain mountain over large boulder talus and some sheer faces with ladders and iron rungs. In an infamous section called the bottleneck, climbers traverse a towering overhang of precarious glacial ice and massive, sometimes unstable, seracs.
But which mountains kill the most is rather surprising.
Perhaps the most difficult peak on our list is colorado's long's peak. That mountains kill is part of their appeal. As the tallest mountain in the lower 48 states (the continental us states), climbing mount whitney is quite the achievement. 60 people have died climbing the mountain, and only 157 have successfully summitted it, a ratio of 38%, which is worse than k2.