mountain of god

Climb Ol Doinyo Lengai

A steep night climb up the Maasai's sacred, still-active volcano, high above the soda flats of Lake Natron.

Height

About 2,960 m

Location

Near Lake Natron, northern Tanzania

Climb

Steep night ascent from the base

Trips

From 3 days, starting in Arusha

an active volcano

A climb like no other

Ol Doinyo Lengai rises from the floor of the Rift Valley in northern Tanzania, just south of Lake Natron. Its name means Mountain of God in the Maa language, and it is sacred to the Maasai who live around it.

It is the only active volcano on Earth known to erupt natrocarbonatite lava. This unusual lava runs at around 500 to 600 degrees Celsius, far cooler than ordinary basalt, and flows almost like water. It looks dark when fresh and weathers to white, which gives the summit its pale, snow-like colour.

The cone of Ol Doinyo Lengai above the plains near Lake Natron

The climb

The climb starts in the middle of the night, to avoid the heat of the day. After a short drive to the foot of the volcano, you walk by headtorch up a steep slope of loose ash and rock. There are no huts or camps, and the gradient barely eases, so short, regular rests make a big difference.

You reach the crater rim at around sunrise, with views over the Rift Valley and Lake Natron. Coming down is quicker but hard on the knees, and the loose ground makes it the most likely time to slip, so take it slowly and follow your guide.

Lake Natron and Munge Waterfalls

Most trips include time around Lake Natron, a highly alkaline soda lake below the volcano and an important breeding area for lesser flamingos.

Near the lake, a walk through the Rift Valley landscape leads to Munge Waterfalls, where fresh water flows through the volcanic rock. Many of our Lengai trips also include a visit to a Maasai community to learn about traditional homes, livestock and daily life.

Who is it for?

Lengai is for fit, confident walkers who do not mind steep, loose ground and a night without sleep. It is not a technical climb, but it is physically hard. Bring sturdy boots, warm layers for the night, a waterproof jacket and a headlamp with spare batteries.

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before you ask

Common questions

Eruptions here are usually small, but the mountain is active and conditions change. Climbs go ahead only when local guides judge it safe, and you must follow your guide's instructions on the crater rim.

The drive to Lake Natron is long, on rough roads for the last part, so most trips spend at least one night near the lake before the climb.

Yes. Lake Natron can be linked with the northern Serengeti or the Ngorongoro highlands, although the roads are slow. We will plan a route that makes sense for your dates.

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