A Peak Marcello Adventure. While there, Peak is invited to climb Hkakabo Razi, one of the most isolated mountains in the world, to discover the exact elevation of the mountain. But getting to the mountain will involve a four-week trek through tropical rain forests rife with hazards - from venomous reptiles and leeches to corrupt police and military. In the end, summiting Hkakabo Razi may be the easiest thing Peak does.