Mountain Madness interests. While leading Mountain Madness, Fischer became renowned for his ascents of the world's highest mountains made without the use of supplemental oxygen. Fischer and Wally Berg were the first Americans to summit Lhotse, the world's fourth highest mountain (27,940 feet / 8516 m), located next to Mount Everest. He and Ed Viesturs were the first Americans to summit K2, (28,251 feet / 8611m) in the Karakoram of Pakistan without supplemental oxygen. During his stewardship of Mountain Madness, Fischer led social and environmental initiatives to help people in the countries in which Mountain Madness traveled. As the leaders of the
Mountains of Central Asia Mountains of Central Asia South of the northern low lands is a great belt of mountains and plateaus. The Pamir plateau in central Asia forms mountainous chains running out in different directions. The mountain chains of the Himalayas, Karakoram and Kunlun run towards the east. The plateau of Tibet, enclosed by the Himalayas and Kunlun, is the largest and highest plateau of the world. Mount Everest in the Himalayas is the highest peak in the world. The vast cool desert of Gobi is in this region. The Mountains of Central Asia are a biodiversity hot spot designated by Conservation International