Everest Base Camp Difficulty & Altitude Guide
April 21, 2026
The Everest Base Camp trek covers roughly 130 km round trip over 12–14 days, but the real challenge is altitude, not distance — above 3,500 metres the air holds noticeably less oxygen, and your body needs time to adjust.Acclimatisation days built in at Namche Bazaar (3,440m) and Dingboche (4,410m) give your body a chance to produce more red blood cells and adapt to lower oxygen levels before you push higher.Mild symptoms like headache, poor sleep and shortness of breath are common and expected; the golden rule is to never ascend further while symptoms are worsening, and to descend immediately if they become severe.With a sensible pace, proper hydration, and a guide trained to recognise altitude sickness early, the vast majority of trekkers reach Kala Patthar and Everest Base Camp safely.
