The Mt Everest or Solu khumbu region is the second-most trekking area in Nepal. It would probably the most popular destination,but it is more expensive and difficult to get to solu Khumbu than to the Annapurna area. To get n near Everest , you must either walk for a week or fly to Lukla remote mountain airstrip where flights are ntoriously unreliable.

Solu Khaumbhu is Justifiably famous,not only for its proximity to the world's highest mountain ( 8850), but also for its Sherpa villages and monasteries. The nominal goal of an Everest trek in the Everest base camp at an elevation of about 5340m. You cannot see Everest from base camp,so most trekkers climb kala pattar,a 5545m bumb on the southern flank of pumori (7145m). From Kala pattar there is a dramatic views of Mt Everest.
Other than the problem f access,the other major complication to an Everest trek is the high likekihood of Acute Mountain Sickness (AMS).