extreme-beautiful-world.blogsp… — Here is the Ultimate Mountain Bike Tour (Lhasa-Kathmandu), which is the world's Longest & Deepest Mountain Bike descent. The only trip in the world where one can continue to Everest Base Camp with bike! This is almost 15 days of biking with full logistic support where the total descent will be unbelievable 4600m till the bikers reach Kathmandu.