Sahara guide · Rachid Excursions
15 Fascinating Facts About the Sahara Desert
The Sahara covers about 9.2 million km² (3.6 million mi²), roughly the size of the contiguous United States or China, which makes it the largest hot desert on Earth. Written in Marrakech and checked against the cited climate and earth-observation references below.
By Rachid — Owner and itinerary editor, Rachid Excursions · Updated 27 July 2026
15 facts, checked and current
1. It is the largest hot desert on Earth
The Sahara covers roughly 9.2 million km² (3.6 million mi²) — about the size of the contiguous United States or China. Only the polar deserts of Antarctica and the Arctic are larger, and neither of those is a hot desert.
2. It spans eleven countries
The Sahara stretches across Morocco, Algeria, Tunisia, Libya, Egypt, Sudan, Chad, Niger, Mali, Mauritania and Western Sahara — from the Atlantic Ocean on the west to the Red Sea on the east, and from the Atlas Mountains to the Sahel savannah.
3. "Sahara" literally means "desert"
The name comes from the Arabic word ṣaḥrāʾ (صحراء), which simply translates as "desert" or "wilderness". So "Sahara Desert" is technically "Desert Desert" — a linguistic quirk locals like Rachid often smile at.
4. Only about 25% of it is sand dunes
Popular imagination pictures endless dunes, but the Sahara is mostly gravel plains (reg), rocky plateaus (hamada), dry valleys (wadis) and salt flats. The famous dune seas — called ergs — cover roughly a quarter of its surface. Morocco's Erg Chebbi and Erg Chegaga are two of the most accessible.
5. Erg Chebbi dunes reach up to ~150 metres tall
The dunes above Merzouga rise to around 150 m (490 ft) at their highest crest — roughly the height of a 45-storey building. They shift shape constantly with the wind, which is why every sunrise looks slightly different.
6. It gets cold — really cold — at night
Summer daytime temperatures regularly exceed 45 °C (113 °F), but the dry air holds almost no heat overnight. Winter nights in Merzouga or Chegaga can drop close to freezing, and January mornings sometimes see frost on the dunes. Bring layers — a fleece is not optional.
7. Snow has fallen in the Sahara
In January 2018 and again in January 2022, the town of Aïn Séfra in northern Algeria — nicknamed the "gateway to the desert" — woke up to red dunes dusted in snow. It is rare, but it happens roughly once a decade.
8. It was green just 6,000 years ago
During the "African Humid Period" (roughly 11,000 to 5,000 years ago), the Sahara was a mosaic of grasslands, lakes and rivers home to elephants, giraffes and hippos. Prehistoric rock art in Tassili n'Ajjer (Algeria) and near Aït Ben Haddou shows this vanished green world in astonishing detail.
9. Camels are not native — they arrived around 200 CE
The one-humped dromedary was introduced from Arabia in the early centuries CE and transformed trans-Saharan trade. Berber and Tuareg caravans of thousands of camels once carried gold, salt and books between Timbuktu, Sijilmassa and Marrakech.
10. The Sahara fertilises the Amazon
Every year, NASA satellites track roughly 182 million tonnes of mineral-rich dust lifted from the Bodélé depression in Chad and blown across the Atlantic. Around 27 million tonnes of it settle in the Amazon basin, delivering phosphorus that the rainforest could not otherwise replace.
11. It is one of the best stargazing places on Earth
Low humidity, sparse settlement and a flat horizon can create very dark skies away from camp lighting. Milky Way visibility depends on clouds, moon phase, season and the exact camp location, so check a current sky forecast before travel.
12. It is home to more life than you think
The Sahara supports fennec foxes, desert monitor lizards, addax antelopes, dorcas gazelles, sand cats, dromedaries and more than 500 plant species. Most animals are nocturnal or crepuscular — dawn and dusk on a camel ride are your best chance to spot tracks.
13. The Sahara has real oases — including one you can visit in a day
Underground aquifers surface in more than 90 major oases. Morocco's Draa Valley alone strings dozens of them along a 200 km palm belt south of Ouarzazate. On our Merzouga route you cross the Todra and Dades gorges, both fed by mountain springs.
14. The Sahara is expanding — but slowly
Studies from the University of Maryland show the Sahara has grown roughly 10% since 1920, mostly southward into the Sahel. The change is driven by both natural climate cycles and human activity, and it is one reason sustainable low-impact tourism matters here.
15. You can sleep in it — comfortably
Modern desert camps in Erg Chebbi and Chegaga range from simple Berber nomad tents to "luxury" camps with real beds, en-suite bathrooms, hot showers and Moroccan dinners served under the stars. It is one of the few places on Earth where you can go from a 4×4 to a candlelit tagine to the Milky Way in the same evening.
Sources and verification
- Saharan dust feeds Amazon
NASA Earth Observatory
Satellite-observed Saharan dust transport and scale.
- Morocco historical climate data
World Bank Climate Change Knowledge Portal
Long-term climate context; local conditions still need a current forecast.
Frequently asked questions
Sahara journeys we run from Marrakech
Nuestro programa compartido a Merzouga: salida de Marrakech a las 07:30 y cruce del Alto Atlas por el Tizi n'Tichka hasta la kasbah de Aït Ben Haddou, Patrimonio de la Humanidad, y la kasbah Taourirt; después, el Valle de las Rosas y el Dades. El día 2, ruta hasta Merzouga para un paseo en camello al atardecer y noche en un campamento bereber con tambores y cena. El día 3, amanecer sobre las dunas y regreso a Marrakech, o continuación a Fez por 25 € más.
Zagora 2 días — Tour por el desierto
2 días · 1 noche · Aït Ben Haddou · Ouarzazate · Paseo en camello · Campamento en el desierto
Una travesía clásica de dos días desde Marrakech hasta el valle del Draa y el Sáhara de Zagora. Sube el puerto del Tizi n'Tichka, pasa la mañana en Aït Ben Haddou, Patrimonio de la Humanidad, con un guía local, visita la kasbah Taourirt en Ouarzazate y continúa hacia el sur hasta Zagora para dar un paseo en camello al atardecer y pasar la noche en un campamento bereber bajo las estrellas. Despierta con el amanecer sobre las dunas y regresa a Marrakech por Ouarzazate. Una alternativa más corta y sencilla a Merzouga: la misma magia del desierto en la mitad de tiempo.
Nuestra experiencia estrella en el Sáhara: cruza el Alto Atlas por el Tizi n'Tichka, visita la kasbah de Aït Ben Haddou, Patrimonio de la Humanidad, y el valle del Dades, y adéntrate en camello en las dunas del Erg Chebbi para dormir bajo las estrellas en un campamento bereber tradicional.
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