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
A shared 3-day / 2-night desert tour from Marrakech to the Erg Chebbi dunes at Merzouga, from €70 per person (Standard €95, Luxury €120), leaving at 07:30. The price covers transport, a hotel night in Dades and a night in a desert camp, 2 breakfasts, 2 dinners and a 1-hour camel ride; lunches are extra. The route: cross the High Atlas via Tizi n'Tichka to the UNESCO kasbah of Aït Ben Haddou and Kasbah Taourirt, then the Rose Valley and Dades. Day 2 drive to Merzouga for a camel ride at sunset and a Berber desert camp with drumming and dinner. Day 3 sunrise over the dunes, then return to Marrakech — or continue to Fes for +€25.
Zagora 2 Days — Desert Tour
2 days · 1 night · Ait Ben Haddou · Ouarzazate · Camel ride · Desert camp
A shared 2-day / 1-night desert trip from Marrakech to Zagora for €60 / MAD 600 per person, leaving at 07:30. It includes transport, hotel pickup, a guide at Aït Ben Haddou, a 1-hour camel ride, a night in a Berber camp, dinner and breakfast; lunches are extra. Zagora is not Merzouga: its dunes are smaller than Erg Chebbi, and you trade dune size for one night instead of two. Climb the Tizi n'Tichka pass, spend the morning in UNESCO-listed Aït Ben Haddou with a local guide, visit Kasbah Taourirt in Ouarzazate, then continue south to Zagora for a sunset camel ride and a night in a Berber desert camp under the stars. Wake up to sunrise over the dunes and return to Marrakech via Ouarzazate.
Our signature Sahara experience: cross the High Atlas via Tizi n'Tichka, visit the UNESCO kasbah of Aït Ben Haddou and the Dades Valley, then ride camels into the Erg Chebbi dunes to sleep under the stars in a traditional Berber camp.
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