Denali, formerly known as Mount McKinley, is the highest peak in North America and one of the largest massifs in the world. This colossal mountain, standing at twenty thousand feet, dominates the South Central Alaska skyline with its stunning white presence. It holds the title of being the third highest of the Seven Summits, following Mount Everest in Nepal and Aconcagua in Argentina. The measurement of a mountain's highest point above sea level determines its ranking, and astonishingly, when measured from its base to its peak at eighteen thousand feet, Denali surpasses Mount Everest in height. For Mike Helms, Bob Kandiko, Simon McCartney, and Jack Roberts, their ascent of Denali would become a gripping tale of survival and heroism.