The tallest mountain in the Himalayas is Mount Everest, which has an elevation of 8,848 meters (29,029 feet) above sea level. It serves as a natural border between Nepal and the Tibet Autonomous Region of China. Because of its height, it presents significant challenges to climbers, including extreme weather conditions and altitude sickness. Mount Everest is also a part of the Himalayan mountain range, which features some of the highest peaks in the world.