The Pyramid International Laboratory-Observatory stands at about 5,050 m in a side valley north of Lobuche, a 30–40 minute walk off the main trail. It was built by the Italian Ev-K2-CNR association with Nepali partners and opened in 1990. Its solar-powered glass pyramid has hosted scientists studying how the body copes with altitude, atmospheric pollution, glacier change and weather in the high Himalaya. A climate monitoring station nearby fed data into global networks.
Over the years, operations at the Pyramid have changed with funding and partnerships, and part of the site has also offered lodge accommodation. Whether the laboratory is open for visits when you pass depends on the current season, so ask your guide and check current status before you travel. Even if the building is closed, the walk to it is worthwhile for the quiet valley and close views of Lobuche peaks.
The trail leaves the main route north of Lobuche and climbs gently up a side valley, gaining about 100 m. It makes a good afternoon acclimatisation stroll after arriving from Dingboche, as long as you feel well. Turn back early if you feel tired or the weather closes in. Many trekkers combine it with the sunset view of Nuptse from the moraine on the way back.
Good for
- Solo
- Photographers
- Groups
Questions travellers ask
What is the Pyramid near Lobuche?
It is a high-altitude research laboratory at about 5,050 m, built by the Italian Ev-K2-CNR project and opened in 1990. It has been used for research on physiology, climate and glaciers. Access and operations vary, so check current status.
Can trekkers stay at the Pyramid?
Part of the site has operated as a lodge in some seasons, but this is not guaranteed. Most trekkers sleep in Lobuche. Ask your guide about current arrangements before relying on it.
How far is the Pyramid from Lobuche?
About 30–40 minutes' walk north of Lobuche, gaining roughly 100 m up a side valley. It makes an easy afternoon walk for acclimatisation if you arrive early and feel well.
