nepalese porters carrying a heavy load to the pass on the road to everest base camp in sagarmatha national park, himalayas

activity altitude asia asian backpack base camp carry climbing difficult everest expedition gear glacier gorak hard heavy hiker hiking himalaya himalayan ice kala khumbu landscape load mount mountain mountaineering national nature nepal nepalese outdoor outdoors park pass patthar peak people poor porter sagarmatha season shep sherpa tourism tourist traditional travel trekking work working