Cross the Kongma La to Lobuche

The Three Passes trek links the Kongma La, Cho La and Renjo La in a loop through the high Khumbu, and the Kongma La is the highest of them, at about 5,535 m. Most people cross it from Chhukung to Lobuche. The day starts in the dark, climbing steeply from the Imja valley over rocky slopes and past small frozen lakes below the pass.

The top is a narrow notch of stone, cairns and prayer flags, with a view back to Makalu and Island Peak and forward over the Khumbu glacier to Pumori and the peaks around Everest Base Camp. The descent is steep and loose, then comes the hardest part for many: a crossing of the rubble-covered Khumbu glacier, rough and tiring, before the trail reaches Lobuche at about 4,940 m.

This is a serious day of 8–10 hours. Attempt it only after full acclimatisation, ideally after climbing Chhukung Ri, in clear weather and with a guide who knows the route. Snow or ice can make the pass dangerous; microspikes help. Carry plenty of water, food and warm layers. If weather or health is doubtful, walk round via Dingboche instead.