In 2008, he completed a 75 day High altitude trek from the Mt. Everest region to Kanchenjunga, climbing all the high passes between them, covering a total of approximately 1,100km of Himalayan terrain.. Through his 2,000-kilometre, 132-day trans-Himalayan expedition from Mount Everest to Mount Kailash, Malli wanted to bring to everyone's attention the damage being done to both hills and plains by global warming and also to help in mapping the change in glacier topography.