Overview
Ol Doinyo Lengai, which means Mountain of God in Maasai, is an active volcano near the Kenyan border, standing at about 2,962 m, though the height changes with eruptions. It is the only volcano in the world known to erupt natrocarbonatite lava, which is black and cooler than normal lava and turns white as it weathers.
The volcano lies near Lake Natron, a shallow, salty and highly alkaline lake coloured red and orange by bacteria, and an important breeding ground for lesser flamingos. The area is remote, with rough roads and basic camps, and few visitors. The climb of Lengai is steep and usually done at night to avoid the heat, with a guide from the local Maasai community.
Highlights
- The Lengai summit climb, usually at night, with a guide
- Lake Natron and its flamingo colonies
- Waterfalls and gorges in the Engare Sero area
- Maasai culture and village visits
Best time to visit
June to October is the dry season, with easier roads and cooler days. The flamingos breed from about July to November, depending on lake levels. The wet season, from March to May, can make roads impassable and the climb dangerous.
- JanJanuary: Not ideal
- FebFebruary: Not ideal
- MarMarch: Not ideal
- AprApril: Not ideal
- MayMay: Not ideal
- JunJune: Best
- JulJuly: Best
- AugAugust: Best
- SepSeptember: Best
- OctOctober: Best
- NovNovember: Good
- DecDecember: Not ideal
● Best · ○ Good · blank: not ideal. Conditions vary by year, so check local forecasts and access before you go.
Getting there
Fly to Kilimanjaro (JRO) or Arusha, then drive about 5 to 7 hours on rough roads to Engare Sero, near Lake Natron. A 4x4 and an experienced driver are essential. Book through a licensed operator, who arranges the guide, camp and park fees. Check access and conditions before you go.
What to expect
Challenging. The climb is steep and loose, with 1,600 m of ascent in the dark. It is hot, and the volcano can be active. Local guides are required, and conditions can change.
Practical tips
- Hire a local guide and a reputable operator, and check the volcano's current activity.
- Start the climb around midnight to avoid the heat.
- Carry water, a head torch and sturdy shoes.
- Respect Maasai customs and ask before taking photographs.
Frequently asked questions
Is Ol Doinyo Lengai active?
Yes. It erupts occasionally, so check current conditions before you climb.
How hard is the climb?
It is steep and exposed, taking 6 to 8 hours return. It is demanding, so you should be fit.
When are flamingos at Lake Natron?
They breed there from about July to November, but numbers vary.
Official sources
Rules, fees, permits and conditions change. Check the official pages below before you travel.
Last reviewed October 2026. Details are for planning only and can change; confirm access, permits and conditions with official sources before you travel. Spotted something out of date? Tell us. Photography: Pyjoel (CC BY-SA 4.0) via Wikimedia Commons.
