young hiker backpacker man using trekking poles enjoying the thamserku 6608m mountain with flying rescue helicopter during high

6608m acclimatization adventure aircraft altitude asia backpacker base bazaar beautiful blue camp climbing cloud cold enjoying everest extreme flying glacier helicopter high hiker hiking himalaya himalayas khumbu landscape man mount mountain mountaineering mountains namche nature nepal nepali outdoor park peak poles range rescue route scenery scenic sky snow snowy summit thamserku top tourism transport transportation travel trek trekking using valley view walk weather winter young