Plizio Visual Lab

Chott Melrhir

Plizio editorial teamUpdated: Jun 2026Data Sources

Relief

Weather…

The relief of Chott Melrhir is characterized by a massive endorheic depression marking the lowest topographical point in Algeria. The depression spans a wide area in the northeastern part of the Algerian Sahara and lies on average about 40 meters below sea level. Geologically, it is a closed basin where sediments and salts have accumulated over millennia because there is no outlet to the sea. The relief is largely flat and covered by a hard salt crust that cracks upon drying, forming polygonal patterns. The edges of the depression rise gently, transitioning into the surrounding desert plateaus and the foothills of the Aurès Mountains. During the rainy season, the relief briefly transforms into a shallow aquatic landscape, which quickly disappears due to the extreme evaporation rates in the region. This topographical peculiarity influences the local climate and leads to the formation of salt steppes in the transition zones.

Location: Algeria
Nearby: Biskra (66 km)

Best time to visit & climate

The most pleasant time to visit is Mar, Apr, Oct.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Avg °C	11	13	17	22	26	32	35	34	30	24	17	12
Rain mm	19	7	16	17	10	5	1	7	17	12	13	11

📋 Practical info

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Getting there

The region is typically reached via major roads from Biskra or El Oued, leading towards the vast desert depressions. Guided tours or local transport are often the best ways to explore this remote salt basin.

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Best season

The cooler winter months from November to March are highly recommended to avoid the extreme summer heat of the Algerian desert. During this period, the usually dry lakebed might briefly hold shallow water after rare rainfall.

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Terrain & paths

The terrain mainly consists of a vast, flat, and often crusty salt pan lying below sea level. The surface can be uneven, completely dry and cracked, or unpredictably muddy depending on recent weather conditions.

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What to bring

Sun protection, a wide-brimmed hat, sunglasses, and plenty of drinking water are absolutely essential for any desert visit. Sturdy, closed-toe footwear is recommended to walk safely across the abrasive salt crust.

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Parking

Parking is generally informal and typically located at the edges of the depression or near adjacent desert settlements. It is advisable to coordinate transport with local guides who know the safe stopping points.

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Safety

Navigation in this vast featureless environment can be very disorienting without a local guide. Travelers must remain extremely cautious of intense heat, dehydration risks, and softer, unstable ground under the salt crust.

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Time needed

Most visitors spend a few hours exploring the edges and taking photographs of this unique basin. A half-day excursion is generally sufficient, especially given the harsh climatic conditions of the region.

Geography

Coordinates

34.30000, 6.00000

Facts

The depression lies exactly 40 meters below global sea level.
The basin has an east-west extent of approximately 130 kilometers.
The thickness of sediment layers in the basin reaches over 100 meters in places.
Geomorphologically, the area is defined as a 'sebkha'.
Chott Melrhir is part of a larger rift system in North Africa.
The relief prevents surface water from flowing into the Mediterranean Sea.