In general, the trek is mostly moderate and slightly difficult at some places. Trekking to Namche Bazaar from Lukla itself is a challenging walk as the trail is very steep and sloppy. The farthest point on the trek is Tengboche at 3,870m (12,697ft.). You will take an acclimatization hike up to Everest View Hotel which is situated at 3,962m (13,000ft.) while you are in Namche Bazaar. This is in fact, the highest point on the trek. If you are physically fit and mentally strong with a strong determination, then this trek is not as difficult as one can reckon. The only factor that attributes to the difficulty of this trek is the altitude and the long walking hours on uneven terrains for several days.
