Which Mountain Is the Most Deadly to Climb?

Annapurna I in Nepal holds the grimly record of the highest fatality-to-summit ratio among the 14 eight-thousander peaks, with approximately 27% of climbers who reach the summit dying on the mountain (historically, about one death for every three successful summits). By comparison, Everest's fatality rate is about 1–4%. Annapurna's extreme danger comes from massive avalanche-prone slopes, unpredictable weather, and technically challenging routes. K2, the second-highest mountain, has the second-highest fatality rate at about 23%. In terms of total deaths, Mount Everest leads with over 300 fatalities, but its much higher volume of climbers (over 6,000 successful ascents) dilutes the per-attempt death rate.