Kati Thanda–Lake Eyre

Interesting facts

During the 1989–1990 flood an estimated 200,000 pelicans, about 80 percent of Australia's entire population, gathered at the lake to feed and roost.

On 17 July 1964 Donald Campbell drove Bluebird CN7 across the lake's salt flats to a land speed record of 403.1 mph (about 649 km/h).

Campbell was disappointed with that record, because Bluebird CN7 had been designed to reach 500 mph.

The deepest recorded flood, about 6 metres, came in 1974, when observers reported the water as blue as the ocean.

When more than 4 metres deep the lake is no saltier than the sea, but as the salt crust dissolves during a big flood, mass fish kills follow.

Parts of the lake bed carry a salt crust up to about half a metre thick, thickest in Belt Bay, Jackboot Bay and Madigan Gulf.

As the water evaporates toward salt saturation, the alga Dunaliella salina, rich in beta-carotene, can tint the lake pink.

Since 1883 schemes have been proposed to fill the lake with seawater by canal or pipeline to raise regional rainfall, but salt build-up made them impractical.

The lake is really two: Lake Eyre North, about 144 by 65 km, and the smaller Lake Eyre South, joined by the narrow Goyder Channel.

Despite rarely holding water, it has its own yacht club in Marree, whose members say that on still days the mirror-flat lake feels like sailing in the sky.

Why it is worth it

Kati Thanda–Lake Eyre is Australia's largest lake and also its lowest point, sitting about 15 meters below sea level — yet for most of any given decade it is not a lake at all, just a blinding white salt pan. It sits at the bottom of one of the largest internally draining river systems on the planet, gathering runoff from roughly one-sixth of the Australian continent, and still almost never fills, because the region around it receives some of the lowest rainfall anywhere in the country. When it does flood, the water usually didn't fall here — it fell in Queensland or the Northern Territory weeks earlier and traveled hundreds of kilometers down river channels to finally pool in this basin.

A true, near-complete fill has happened only three times in about 160 years of records. When it happens, the transformation is total: pelicans, banded stilts and other waterbirds detect the flood and fly in from hundreds of kilometers away, sometimes overnight, to breed explosively while conditions last, before the water disappears again and the boom-bust cycle resets. It's one of the most extreme examples of desert ecology reacting to an unpredictable pulse of water rather than a seasonal calendar.

The lake's dual name reflects a 2012 change that restored recognition of the Arabana people, for whom the site is called Kati Thanda and holds deep cultural and spiritual significance tied to their Dreaming stories — a reminder that long before it was mapped as an oddity of hydrology, it was already central to the people who have lived around its edges.

Good to know

Ground access to open water is minimal — most roads stop well short of the lake bed — so the flood events (like the major 2025 fill, the largest in at least fifteen years) are usually seen by scenic flight rather than on foot.

Best time to visit

There's no fixed season — timing depends entirely on whether a flood pulse has recently reached the basin. Check recent flood reports before planning a trip; a dry, empty salt pan is still the default state most years.

Getting there

486 km from Whyalla. Coober Pedy Airport (CPD) is about 242 km away.

From the encyclopaedia

Lake Eyre, officially known as Kati Thanda–Lake Eyre, is an endorheic lake in the east-central part of the Far North region of South Australia, some 700 km (430 mi) north of Adelaide. It is the largest ephemeral endorheic lake on the Australian continent, covering over 9,000 km² (3,500 sq mi). The shallow lake is the depocentre of the vast endorheic Lake Eyre basin, and contains the lowest natural point in Australia, at approximately 15 m (49 ft) below sea level. The lake is most often empty, filling mostly when flooding occurs upstream in Channel Country, but almost always partially. On the rare occasions that it fills completely, it is the largest lake in Australia, covering an area of up to 9,500 km² (3,668 sq mi). When the lake is full, it has the same salinity as seawater, but becomes hypersaline as the lake dries up and the water evaporates. To the north of the lake is the Simpson Desert.

Wikipedia · CC BY-SA 4.0