Guelb Er Richât: the eye of the Mauritanian Sahara

In the heart of the Mauritanian Adrâr, Guelb Er Richât traces a succession of concentric ridges across the desert floor, visible from space. This geological structure spanning more than 40 kilometers has intrigued scientists since its revelation to the world in the 1930s and today attracts curious travelers and enthusiasts of raw landscapes.

Nicknamed the "eye of Africa," it forms a razed dome situated at the confines of the Mauritanian Adrâr to the west and the Taoudenni basin to the east, in a zone where the track must be earned and where the true deep desert trails begin.

Why visit Guelb Er Richât

Few geological formations offer such a singular spectacle on the ground. Seen from an airplane or by satellite, Richât evokes a perfect target; seen from its ridges, it reveals a mineral labyrinth with colors that shift with the hour. Several reasons motivate the detour:

• A geological curiosity of world significance, long the source of contradictory scientific hypotheses.
• A demanding desert landscape, accessible only by 4x4 with local accompaniment.
• An immersive Saharan experience far from any marked trail.
• Encounters with nomadic herders grazing goats and camels in deep plains when it has rained.

History and geological mystery

Because of its very size, Richât was revealed only late by Théodore Monod in 1934. No one, whether coming from the northern plateaus or from the dunes of Majabat Al Koubra to the south and southeast (Monod reference, 1958), could have imagined that these low ridges were organized into such a perfect concentric system. The term Richât is the plural of richa (feather), a word that evokes the appearance of its ridges whose wind-facing flanks are streaked with tongues of sand.

For decades, the hypothesis of a meteoritic impact dominated: the regularity of the circle seemed artificial. More recent research has ruled out this lead in favor of an endogenous explanation: a razed dome eroded to expose ancient rocks in concentric layers. The precise dating remains debated, but the origin traces back to very distant geological times, predating the Mesozoic for the deeper layers.

What to see and do on site

The concentric ridges

The system forms a vaguely elliptical ensemble of 22 km and 25 km in diameter, rising from a buttonhole of 45 km called the Taguenzé, opened in the sandstone plateau. Several high points allow you to take in the successive rings at a glance.

The center of Richât

The central part, more eroded, presents changing ground: fragments of volcanic rock, breccias, siliceous fragments. This is where guides often stop to explain the genesis of the site.

Bivouac within the structure

Many circuits include a night bivouacking inside Richât itself. Silence is total there, and the night sky, free from light pollution, counts among the purest in the Sahara.

Pastoral encounters

Depending on the season and rainfall, you may cross nomadic pastoralist camps. Shared tea under a tent remains one of the most striking moments of a Mauritanian stay.

When to go

The favorable season extends from November to March, when daytime temperatures remain manageable (generally between 20 and 30 °C) and nights are cool. From April to October, the heat becomes extreme and makes exploration arduous, even dangerous in the heart of summer. The rare rains, concentrated in summer and early autumn, can temporarily make certain plains verdant.

How to get there

Richât is reached from the town of Atar, capital of the Adrâr and gateway to the Mauritanian desert, or from Ouadane, an ancient caravan city listed by Unesco. The journey follows sandy tracks that require a 4x4 vehicle and a driver familiar with the area.

• From Atar: allow a day of track driving to reach the interior of Richât.
• From Ouadane: the departure is shorter but remains demanding.
• Flights: Atar has an airport receiving seasonal flights from Europe in winter, as well as connections from Nouakchott.

Accompaniment by a local guide is essential: signage is nonexistent and trails change with the winds.

Practical information

• Recommended duration: plan a minimum of 2 days on site to enjoy the location, ideally as part of a week-long circuit in the Adrâr.
• Accommodation: essentially bivouacking under canvas. No solid accommodations inside Richât.
• Water and food: everything is supplied by the organizing team. No resources on site.
• Network: no reliable mobile coverage in the heart of the structure.
• Safety: the situation evolves; consult official recommendations before departure and work with an approved local agency.
• Respect for the site: do not collect rock fragments, leave no waste.

To combine in the region

Guelb Er Richât naturally fits into a broader circuit through the Adrâr and beyond:

• The Amogjar pass and Fort Saganne, on the road between Atar and Chinguetti.
• The ruiniform sandstones of Zarga, spectacular natural sculptures.
• Banc d'Arguin National Park, an ornithological sanctuary on the Atlantic coast.

Frequently asked questions

Preparing your journey to Mauritania

Guelb Er Richât is experienced as part of a complete circuit through the Adrâr, its oases, and caravan cities. To build your custom itinerary, consult our Mauritania travel page and connect with our Sahara specialists.