Lengai Summit Route

There is one way up Ol Doinyo Lengai, and it goes straight up. The climb starts from a trailhead at the foot of the volcano, about an hour by 4x4 from the village of Engare Sero near Lake Natron. There are no camps on the mountain and no shade, so the ascent is made at night, usually setting off around midnight.

What the Climb Is Like

The lower slopes are a steady walk up gullies of loose volcanic ash. Higher up the gradient steepens to as much as 45 degrees on hardened lava and crumbling ash, and you use your hands as much as your feet. It typically takes five to six hours to reach the crater rim at about 2,960 m, in time for sunrise over Lake Natron, the Rift Valley escarpment and, on a clear morning, Kilimanjaro and Mount Meru.

An Active Crater

Ol Doinyo Lengai is the only volcano on Earth that erupts natrocarbonatite lava. It flows at around 500–600°C, far cooler than ordinary lava, looks black or dark brown when fresh and turns white within days as it reacts with moisture, which is why the summit often looks snow-covered. The crater changes from year to year, and local guides decide on the day how far it is safe to go.

The Descent

Coming down takes three to four hours and is hard on the knees: the same loose ash that slowed you on the way up now slides underfoot. By mid-morning the slopes are extremely hot, which is why an early start matters.