Jonathan and Deborah Waterman will attempt to climb Mt. McKinley, known by many climbers as Denali, after travelling by dogsleds for one hundred miles. Meanwhile Jerome Ruby and John Faulkiner set off by another dangerous route to the summit. Denali is known for its extreme weather conditions, often 40. below zero, and the numerous difficulties and risks that have to be overcome to reach the summit. The two teams will attempt to meet at the summit and then descend the West Buttress by extreme skiing and after via plane and kayak.