Elevation: Above 6,000 meters (19,685 feet). Trail Description: Technical climbs requiring advanced mountaineering skills, including peak climbing with crampons and ropes. Duration: Expedition-style treks with camping in high-altitude environments. Fitness Requirement: Demands exceptional physical fitness, health, and mental resilience. Acclimatization: Intensive acclimatization and preparation are required. Examples: Everest Three Passes Trek, Makalu Base Camp, Barun Valley Trek, Ama Dablam Expedition, Island Peak Climbing with EBC Trek, etc