young hiker backpacker man enjoying valley view in makalu barun park route near khare during high altitude acclimatization walk.

acclimatization activity acute mountain sickness adventure altitude ams backpacker backpacking base camp cliff climber climbing everest extreme freedom goal green high hiker hiking himalaya himalayas khare kothe landscape life male man mera peak mountaineer mountaineering mountains nature nepal outdoor outdoors path people scenic sport travel trekker trekking poles vacation walking young enjoying valley view makalu barun park route near during walk active concept image walk nepal