Which mountain has the highest ascent from its base camp to its summit?
Mauna Kea is the tallest mountain in the world when measured from base to summit * The base of Mauna Kea is 19,678 feet below sea level and its summit is 13,796 feet above sea level. * That gives Mauna Kea a total height of 33,474 feet from its base to its summit. * Therefore, it is actually a taller mountain than Mt. Everest which, as as answered below, is 29,035 feet tall and is entirely above sea level from base to summit. * As difficult as Mt. Everest is (or used to be) to climb from base to summit due to its height above sea level and the resultant frigidity and lack of sufficient oxygen at that point in the atmospheret, imagine climbing Mauna Kea from base to summit, starting 19,678 feet below sea level. * There is no oxygen at all for the first 19,000+ feet although it’s a relative cake walk for the next 13 thousand+ feet.