Few places on the planet are as breathtaking as Lake Assal. At 155 metres below sea level, at the lowest point in Africa, a crater of turquoise water opens up, bordered by kilometres of brilliant white salt and fields of black lava. The contrast of colours —the turquoise of the water, the blinding white of the salt, the basalt black of the volcanoes and the ochre of the desert— turns the shore into an almost unreal, otherworldly landscape.
Assal is no ordinary lake: it is one of the saltiest bodies of water on Earth, with a salt concentration ten times higher than the sea. That extreme salinity makes aquatic life impossible, but it lets you float effortlessly and has created 'glaciers' of crystallised salt that crunch underfoot. For centuries, Afar camel caravans came down here to cut blocks of salt —'white gold'— to sell in the Ethiopian highlands.
This guide tells you how to visit Lake Assal from the capital: how to get there along the gulf road, what to see and do on the shore, when to go to escape the scorching summer heat, how to combine it with the Ardoukôba volcano and the Ghoubbet bay, and what precautions to take in one of the most extreme and beautiful settings in the Horn of Africa.
Lake Assal formed in the heart of the Asal Rift, the tectonic fissure where the Red Sea ridge surfaces on dry land and the African and Arabian plates pull apart. Fed by underground seepage of seawater from the Ghoubbet bay and subjected to brutal evaporation, the lake kept concentrating salt until it became hypersaline and laid down salt beds tens of metres thick. For centuries it was the destination of the Afar salt caravans that supplied Ethiopia; in colonial and modern times extraction was partly industrialised. The full story —geological and human— is on our history page.
Read the full history ↓In the middle of the rift, where Africa is splitting from Arabia, Lake Assal marks the lowest point on the continent and the young Ardoukoba volcano is a reminder that the earth here is still opening up.
Read the history of The Great Rift: salt lakes and volcanoes →No exact prices: a scale from $ (budget) to $$$$$ (luxury), with 2-3 options per category.
Origins, formation and what the sources say.
The story of Lake Assal is, above all, a geological one: the story of a continent that is splitting in two. Djibouti sits on the Afar Triangle, one of the few places in the world where three great fractures in the Earth's crust meet: the Red Sea ridge, the Gulf of Aden ridge and the East African Rift. At this triple junction, the African and Arabian tectonic plates are pulling apart at a rate of one to two centimetres a year, and the crust thins, sinks and breaks. The Asal rift, where the lake lies, is precisely the exposed section of the Red Sea ridge: the oceanic rift that anywhere else would be underwater can be walked across on dry land here.
That process explains why the shore of Lake Assal sits 155 metres below sea level. The depression kept sinking as the crust stretched, and the floor of the rift ended up far below ocean level, becoming the lowest point in Africa and the third lowest on the entire land surface of the Earth, behind only the Sea of Galilee and the Dead Sea. All around, basalt lava flows between 3.4 and 1 million years old, volcanic cones and steaming fissures form a landscape that looks freshly forged by the planet.
The lake's water doesn't come mainly from rivers (it hardly ever rains in this arid land) but from underground seepage of seawater that filters in through the fractured rock from the Ghoubbet bay, about ten kilometres to the southeast. Once it reaches the depression, under a sun that pushes temperatures above 50 °C in summer, the water evaporates at a ferocious rate and leaves all its salt behind. That cycle, repeated over thousands of years, turned Lake Assal into one of the saltiest bodies of water on the planet.
Lake Assal has an average salinity of around 35 %, about ten times that of seawater, which puts it among the saltiest lakes in the world. That extreme concentration means no fish or plant can live in its waters, but it also makes the salt crystallise along the shores into crusts, pinnacles and real white 'glaciers' that crunch underfoot. Beneath the lake, the salt deposits are tens of metres thick: hundreds of millions of tonnes are estimated to have built up.
For centuries, that 'white gold' drove the region's economy. Camel caravans of Afar herders came down to Lake Assal, cut blocks of salt from the crust and loaded them up for journeys of several weeks across the desert to the markets of the Ethiopian highlands, where salt was so valuable it was even used as currency. Those salt caravans, sisters of the ones that still cross the neighbouring Danakil Depression, are part of the memory and identity of the Afar people.
With the arrival of the Europeans, extraction began to industrialise. In 1893, the French government granted the businessman Léon Chefneux exclusive rights to extract salt from the lake. Modern semi-commercial production got going towards the end of the 20th century and boomed between 1998 and 2000, during the war between Ethiopia and Eritrea, when Ethiopia, cut off from its usual ports, turned once again to Djiboutian salt. In recent years, concessions have been granted to several companies that extract salt at the southeastern end of the lake, though still on a modest scale compared with the mass-production plans announced at the time.
Lake Assal fascinated the 19th-century European explorers who ventured into Afar country. Its mix of hellish heat, dazzling salt and total isolation made it one of those legendary places in the Horn of Africa, as feared as it was coveted. The area was part of the Afar territory whose sultanates, among them the Sultanate of Tadjoura, negotiated with France the cessions that gave rise to the colony of French Somaliland, later the French Territory of the Afars and the Issas, and finally the Republic of Djibouti, independent since 1977.
Throughout the 20th century, the Asal rift also drew scientists. The area became a natural laboratory for studying how an ocean is born: geologists and volcanologists from all over the world came to measure the separation of the plates, install sensors and watch live the process that, millions of years from now, could open a new sea separating the Horn of Africa from the rest of the continent. The eruption of the nearby Ardoukôba volcano in November 1978 made it possible to observe one of these rifting episodes in real time.
Today Lake Assal is at once a first-rate scientific site, an economic resource and Djibouti's great tourist icon. Its image (the turquoise of the water, the white of the salt, the black of the lava) appears on postcards, banknotes and the country's promotional campaigns. Despite its fame, it remains a wild and largely untouched place, with no heavy tourist infrastructure, where visitors feel tiny in the face of the forces that shaped the landscape.
Lake Assal is also one of the hottest inhabited places on the planet. In summer, from May to September, temperatures by the lake often go above 45 °C and come close to 50 °C, with punishing humidity and sunshine. In winter, from October to April, the heat eases to highs of about 30 to 34 °C, and that's when a visit makes sense. The almost complete lack of rain and the extreme evaporation keep up the fragile balance that produces the salt.
That same extreme character makes the environment delicate. The growing number of visitors, vehicles driving over the salt crust and litter all threaten a landscape that recovers very slowly. The Djiboutian authorities and local operators stress how important it is to leave no rubbish, stay on the tracks and respect the work of the Afar vendors, who still make their living from salt like their ancestors did.
Together with the Ghoubbet bay, the Ardoukôba volcano and Lake Abbé, Lake Assal is part of a group of geological wonders that Djibouti promotes as its great natural attraction and hopes to protect. Visiting it means looking in on a moment in the Earth's history that can be seen in the open in very few places in the world: the moment when a continent breaks apart and, very slowly, a new ocean is born.
