At a glance
- Area: about 33 km², but only part of it is open sand.
- Origin: the sand was left by glaciers; people exposed it by cutting down the forests in the Middle Ages.
- Protection: Natura 2000 site “Pustynia Błędowska” (PLH120014).
- Wildlife: antlions, woodlarks and viviparous lizards live here; grey hair-grass and sand sedge grow on the sand.
The Błędów Desert is the largest area of shifting inland sand in Poland. It covers about 33 km² and stretches for about 18 km from east to west, between Klucze, Chechło and Błędów. It did not form like the Sahara, from a dry climate. It is largely the work of people.
How the desert formed
The sand came with the glaciers. During the Ice Age, glaciers and their meltwater left a thick layer of sand here. It is about 40 m deep on average and up to 70 m in places.
People exposed it. For centuries the sand was covered by forest. In the 13th and 14th centuries the forest was cut down on a large scale for the silver and lead mines and smelters around Olkusz. Without trees, the wind began to move the sand and dunes formed.
Then the desert started to become overgrown. In the 20th century, especially from the 1960s to the 1990s, trees were planted, and pine and birch spread onto the sand on their own. In 1992 a fire destroyed 836 ha of forest around the desert. By the end of the 20th century much of the desert was green.
How it is being restored
For more than a decade, the desert has been cleared again.
- 2011–2014: in an EU LIFE project, the Klucze municipality removed trees from the southern part and restored the sand habitats.
- 2014–2017: the army carried out a similar project in the military area in the north, clearing about 375 ha of unexploded ordnance along the way.
- 2015–2017: a regional project removed invasive species and introduced yearly autumn ploughing of the sand to stop regrowth. The Róża Wiatrów viewpoint was also built as part of it.
Without this work, the desert would turn back into forest within a few decades.
Natura 2000
The desert is the Natura 2000 site “Pustynia Błędowska” (PLH120014), covering about 1,964 ha. It protects two rare habitats: inland dunes with open grasslands and xeric sand calcareous grasslands. The second is a priority habitat in the European Union, meaning it is of special value.
Plants
About 100 species adapted to drought and heat grow on the sand. The most common are:
- grey hair-grass, a blue-grey grass that forms tufts on bare sand,
- sand sedge, whose underground shoots create straight “lines” of tufts across the sand,
- marram grass, familiar from coastal dunes,
- wild thyme and fescues.
In spring the tiny common whitlowgrass flowers. Protected species also grow here, including the stemless carline thistle.
Animals
- Antlion: its larva digs funnel-shaped traps in the sand to catch ants. They are easy to spot at the edge of the desert.
- Tiger beetle: a fast, predatory beetle that hunts on hot sand.
- Birds: woodlark, meadow pipit, red-backed shrike, ortolan bunting and, over the forest, the honey buzzard.
- Reptiles: viviparous lizard, slow worm and adder. Adders are shy, but watch your step in long grass.
Heat and mirages
In summer the sand surface heats up to as much as 60°C and cools quickly at night. This is why the desert can be dangerous for unprepared visitors.
Mirages in the Błędów Desert are not a legend: they were described between the two world wars, when the open sand covered its largest area. Today they are rare, although hot air over the sand often makes the horizon shimmer.
How not to harm nature
- Stay on the marked paths, especially in spring, when birds nest on the ground.
- Do not pick plants or take sand.
- Driving vehicles on the sand is not allowed without the municipality’s permission.
- Take your litter home.
See also: walking routes in the desert and practical questions and answers.
Frequently asked questions
Is the Błędów Desert a real desert?
Not in the climatic sense, as it gets as much rain as the rest of Poland. It is an area of shifting sand that formed after the forests were cut down in the Middle Ages.
Why is the Błędów Desert becoming overgrown?
Because the forest naturally returns. Since 2011 trees have been removed and the sand ploughed to keep the dunes open.
Do mirages occur in the Błędów Desert?
They were described between the two world wars. Today they are very rare.
How big is the Błędów Desert?
About 33 km², but open sand covers only part of it.
Information as of September 2026. Sources: Klucze municipality, RDOŚ Katowice (Natura 2000 PLH120014), Śląskie. Przyroda!, Radio Kraków.