Lake Natron, Tanzania: Why It's Red, the Stone Animals and How to Visit

Lake Natron is the red lake from the viral photos, the one said to turn animals to stone. The real place is stranger and less deadly than the internet suggests: a shallow soda lake at the foot of an active volcano, where most of the world's lesser flamingos are born.

Lake Natron is a soda lake in the Arusha Region of northern Tanzania, up to 57 km long and less than 3 m deep. Its northern tip crosses the border into Kenya. BirdLife International calls it East Africa's only regular breeding site for the lesser flamingo.

Key takeaways

• It's red because of microbes. Salt-loving microorganisms colour the water and the salt crust.
• It doesn't turn animals to stone. The famous pictures are a photographer's posed shots of birds and bats that died on the shore; the soda dries and preserves them.
• No documented human deaths. The best-known accident, a film helicopter crash in 2007, had no fatalities.
• Don't swim in the lake. Swim in the freshwater pools below the Ngare Sero waterfall instead.
• Flamingos are the headline. BirdLife says 75% of the world's lesser flamingos depend on it.
• Treat it as an add-on. One night at Natron fits between Tarangire and the northern Serengeti, adding lake scenery and birdlife rather than big game.

Lake Natron at a glance

Why is Lake Natron red?

Lake Natron is red because of salt-loving microorganisms. NASA's Earth Observatory describes the salt crust on the lake as often coloured red or pink by the microbes that live in it, including spirulina, a blue-green cyanobacterium with red pigments. When the dry season drives off water, the lake gets saltier and the microbes bloom, deepening the colour of the open water and the crusts along the edge.

The chemistry behind it is volcanic. Hot springs and the Southern Ewaso Ng'iro River feed the lake, carrying sodium carbonate from the surrounding rocks into a hot, shallow basin. That's the natron the lake is named after, a natural mix of washing soda and baking soda. NASA puts the lake's alkalinity at pH 9 to 10.5 depending on recent rain; some sources quote figures above 12.

Does Lake Natron turn animals to stone?

Lake Natron doesn't turn animals to stone. The pictures that made it famous were taken by the photographer Nick Brandt, who found birds and bats that had died along the shoreline and, as National Geographic reported in 2013, "posed them as they had been in life" on branches and rocks. Brandt's theory was that the lake's mirror-like surface confused them and they flew into it.

The animals weren't calcified either. The geologist Thure Cerling told National Geographic they were probably just coated in sodium carbonate, because there is almost no calcium in the lake. What the natron does is dry out a carcass before it can rot. It's the same kind of mineral ancient Egyptian embalmers used to dry bodies for mummification, though theirs came from Egypt's Wadi El Natrun, not from Tanzania.

So the "Lake Natron statues" and "mummies" are real, but they're preserved remains arranged by a photographer, not animals frozen mid-flight.

Has anyone died in Lake Natron?

We could find no documented case of a person dying in Lake Natron, in news reports or scientific sources. The "human deaths" searches seem to grow out of the stone-animal photos rather than any actual incident.

The best-documented accident happened in December 2007, when a helicopter filming the flamingos for a documentary clipped the water and crashed into the lake. According to the NZ Herald, everyone on board survived. The cameraman's eyes burned from the soda, and Maasai from the area made stretchers for the injured and helped get them to a nearby camp.

If you're wondering which lake has killed the most people, the one usually named is Lake Nyos in Cameroon. In 1986 it released a cloud of carbon dioxide that killed around 1,700 people, according to a report in the BMJ. Natron has no history like that.

Is Lake Natron dangerous, then? To a bird that misjudges the surface, yes. Its "deadly lake" reputation comes from what happens to small animals that end up in the water, and from the soda that preserves them afterwards. To a visitor walking the shore with a local guide, it's a hot, dusty and memorable place.

That pattern holds across a safari. The animals visitors fear most are rarely the ones that cause harm, and our guide to whether safari animals are dangerous works through the risk species by species, down to the mosquito that outranks all of them.

Can you swim in Lake Natron?

You shouldn't swim in Lake Natron itself. The water is strongly alkaline, the NASA figures put it at up to 60 °C where hot springs flow in, and the shallows are thick with mud and sharp soda crust. The helicopter crew in 2007 found out how much the soda stings eyes and skin.

What happens if you swim in it anyway? At the top of that alkalinity range the water irritates and can burn skin and eyes, and the heat near the springs is its own hazard. There's no reason to try, because the swimming is a short drive away. The Ngare Sero river runs down a narrow gorge to a waterfall with freshwater pools, and the guided walk up to it ends with a dip.

What lives in Lake Natron?

Lake Natron is hostile to most life, but not empty. Its star is the lesser flamingo, which feeds on the lake's cyanobacteria and nests on islands of soda that predators can't reach across the caustic water. BirdLife International says the lake supports 1.5 to 2.5 million lesser flamingos, 75% of the species' global population, and the IUCN lists the bird as Near Threatened.

They survive what kills everything else because the lake feeds them. Their food is the cyanobacteria in the water, which grow in lakes this alkaline and almost nowhere else. A lesser flamingo's deep bill strains them out by the mouthful. The same causticity guards the nests: no predator will wade out to the soda islands. The chicks have the harder job. Once they leave the nest, they gather into crèches of thousands and follow a few adults on foot to fresh water at the lake's edge.

Fish survive too. Alkaline tilapia live at the edges of the lake where hot springs flow in, NASA notes, and two species of Alcolapia are found in these warm lagoons. More than 300 bird species use the lake's wetlands and the grassland around it, according to BirdLife.

What you won't find is big game on the scale of the national parks. Most of our guests come to Tanzania for the Serengeti and Ngorongoro wildlife. Natron is the request from people who want flamingos, birdlife and volcanic scenery on top of that. If the detour doesn't fit your route, Lake Manyara on the main circuit also gets lesser flamingos, mostly between November and May.

The lake's future looked shaky for years because of plans to mine its soda. In August 2025 Tanzania's government ruled out large-scale soda ash extraction and allowed only traditional collection at the lake's edge, BirdLife reported.

Ol Doinyo Lengai, the Mountain of God

Ol Doinyo Lengai is the 2,962 m volcano 16 km south of the lake, and its Maasai name means "Mountain of God". It's the only volcano on Earth known to have erupted carbonatite lava in historical times. That lava runs at about 540 to 593 °C, cold for lava, and it pours out black or brown, then turns white within hours or days, which is why the summit can look snow-capped in photos.

The volcano is still active. An explosive eruption began in September 2007 and continued into 2008, and lava has been flowing inside the crater, on and off, ever since.

Climbs start around midnight so that you reach the crater rim for sunrise, always with a local guide. It's a steep scramble on loose ash, and guests who reviewed our partner operators are blunt about it: you need to be in very good shape. A few of the itineraries on our site include the climb, such as the 6-day Tarangire, Natron, Serengeti and Ngorongoro tour. It's charged separately from the Natron activity fee.

How to add Lake Natron to a northern Tanzania safari

We recommend one night at Natron, added to a northern circuit rather than taken as a trip of its own. It sits between the classic parks: Tarangire to the south, the Ngorongoro highlands to the south-west and the northern Serengeti to the west.

A typical route runs Arusha, Tarangire, Lake Natron, the northern Serengeti, the central Serengeti and the Ngorongoro Crater. From Natron the road climbs west through Loliondo and enters the Serengeti at Klein's Gate, which suits the months when the Great Migration is in the north (our migration camps guide shows when). The drive in is long: the partner itineraries on our site allow seven to eight hours from Arusha, so Natron usually comes after a night in Tarangire. Accommodation at the lake is a handful of tented camps and small lodges around Engaresero village.

Of those, Africa Safari Lake Natron is the easiest to recommend for a single night: air-conditioned bungalows and glamping tents on the edge of the lake, a pool facing Ol Doinyo Lengai, and a raised restaurant and bar. Air conditioning counts for more at Natron than it does up in the parks, and the camp's Maasai guides run the flamingo, waterfall and footprint walks.

Two of the safaris on our site already build it in. The 6-day Best of Lake Natron and Great Wildebeest Migration spends a night at the lake with the waterfall walk. The 6-day Tarangire, Natron, Serengeti and Ngorongoro tour adds the Lengai climb. For the bigger picture, our Northern Circuit guide shows how the parks connect.

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Already have a route in mind? Tell us your dates and we'll add Lake Natron to your itinerary. Still choosing a route? Our 7-day Tanzania safari itinerary guide compares four of them.

What to do at Lake Natron

With one night at the lake you'll have time for two or three of these, in the afternoon and the next morning, before the heat builds.

Walk the flamingo shore

A local guide walks you out across the flats towards the flamingo flocks. Their numbers vary from year to year, so no month guarantees a pink shoreline.

Hike to the Ngare Sero waterfall

Several guests single out the waterfall walk in their reviews of our partner operators. The path follows the river up a gorge, and you wade part of the way. One guest's advice is worth repeating: wear sandals that strap on, or trainers you don't mind soaking.

See the Engare Sero footprints

A mudflat just south of the lake preserves at least 408 human footprints. Barefoot people made them in the late Pleistocene, probably more than 10,000 years ago. A 2020 study in Scientific Reports called it the largest collection of fossil human footprints known in Africa.

Fees and the best time to go

Natron isn't a national park, so the park fees you pay in the Serengeti don't apply. Instead you pay district, wildlife-authority and community fees on the way in. A community activity fee covers the lake shore, the waterfall and the footprints. The Lengai climb is extra.

A Natron detour fits most naturally in the dry season, roughly June to October. That's peak season on the northern circuit, and the migration herds spend much of it in the northern Serengeti. It's hot at Natron at any time of year, so the walks start early or late.

Frequently asked questions

Lake Natron doesn't look like anywhere else on a Tanzania safari. After days of grassland and game drives, you drop into a heat-shimmered basin of red water and white crust, with a volcano at the end of the road and pink flocks along the far shore. It's a strange, hard, beautiful place, and the stories are a lot less grim than the internet makes them.