1 Mount Everest is difficult to get to and more advances made in equipment, transportation, communications, and weather forecasting since the forest major expeditions in the 1920s. The mountain itself lies in a highly isolated location. There are no roads in the region on the Nepalese side, and 1960s all goods and supplies had to be carried long distances by humans and pack animals. Since then, airstrips built in the Khumbu valley have greatly facilitated transport to the vicinity, although the higher areas have remained accessible only via footpaths. In Tibet there is now a road to the north-side Base Camp.