Danakil — Erta Ale

Volcanoes & CratersAfar,Ethiopia

An Ethiopian volcano with a lava lake churning since 1906, climbed at night in the hottest place on Earth, where three plates pull apart.

September·Quiet month

Jun–Oct

Through deep summer the depression bakes toward 50°C, the fiercest heat on Earth, and most operators stop running trips to the Erta Ale volcano. The volcano keeps smoking, and only toward October does the killing heat start to ease.

Year-round The Danakil stays Earth's hottest place every day, and Erta Ale is still erupting. But the lava lake that made it famous drained in the 2017 flank eruption, refilled over the following years, then dropped out of sight again after the eruptions of November 2025 and January 2026. Guides say it may be years before it is reliably visible, so do not come on the promise of open lava.

The Danakil Depression, in the Afar country of northeastern Ethiopia, is the place where the Earth is coming apart. Three tectonic plates are pulling away from one another here, thinning the crust until magma breaks through, and the floor has already sunk more than a hundred metres below sea level. It is also the hottest place on the planet by year-round average. Erta Ale is what the thinning crust produced: a low black shield rising off the desert, whose crater has held molten rock since at least 1906, longer than any other lava lake known. Groups save the last climb for late evening, once the desert has cooled, and go up the black slopes by headlamp. What looked like dull grey rubble in daylight starts to glow ahead of you as you get near the top. What is actually in the pit depends on the year. The lake drained in 2017, rose and fell again, and eruptions in late 2025 dropped it out of sight again. What still reaches you on the rim is the heat coming off the crust, the gas, and the red working through the cracks after dark. You bed down on the rim itself with no shelter, and by dawn the pit has gone a dull cracked grey-silver, thin red lines still creeping between the cooled slabs. The same overland trip crosses to Dallol, where acidic springs crust the ground in sulphurous yellow, green and rust-orange. The brine there is near boiling and more acidic than battery acid. Researchers study it for what life on early Earth or on Mars would have had to survive. Beyond it the salt flats run white to the horizon. Afar miners still cut slabs out of those dried lake beds and lead them out by camel in long lines, working the cooler hours, in one of the last great caravan trades. The salt they are carrying is what an older sea left behind, and the geologists expect the Red Sea to come back in and flood the whole floor.

Worth knowing

Good to know

Even in the "cool" season it stays around 30–35°C — November to February is the only sane window, and even then expect no shade and nights camping rough near the crater.
You cannot go independently — the Afar borderland requires an organized tour with a mandatory armed escort, arranged overland from Mekelle; permits and a local guide are non-negotiable, not a formality.
Carry far more water than feels reasonable — bring a dust mask for the sulphur fumes, a headlamp for the night climb, and thick-soled boots; the crust near the vent can be scaldingly hot underfoot.

Things to do

1
Climb Erta Ale to the crater by night
Most groups save the final ascent for late evening, hiking the volcano's low black slopes by headlamp once the desert cools. What looked like dull grey rubble in daylight starts to glow ahead of you as you near the summit.
2
Sleep rough on the rim with the pit for a nightlight
Expeditions bed down rough on the rim itself, with no shelter. Step up to the edge where the rock drops sheer into the pit. What waits below depends on the year: since the 2017 drainage the level has risen and fallen, and after the 2025–26 eruptions it sits too low to see. What still reaches you is the heat off the crust, the gas, and glow working through the cracks once it is dark. On glowing nights that is the nightlight; on the rest it is the desert sky. Linger past dawn and the pit turns a dull, cracked grey-silver, with thin red lines still creeping between the cooled slabs.
3
Cross Dallol's acid-crusted salt terraces
On the same overland trip, walk the burning flats of nearby Dallol, where acidic springs crust the ground in sulfurous yellows, greens and rust-orange. Watch your footing and breathe through the fumes; it is some of the most alien terrain on the planet.

Watch

Nearby

233 km