Descend some 15,000ft (5,000m) aiming at the longest altitude drop in the world, on a bike. We hike up the world’s largest freestanding mountain to acclimatise over 4 days with porters carrying our bikes & kit. On the 5th day, it's on your bike for as gentle or as rapid & exhilarating descent as you wish. You might even make it into the Guinness Book of World records!