Dune of Pilat

Interesting facts

The dune holds roughly 60 million cubic metres of sand, piled about 500 metres wide from the ocean to the forest.

Its crest was measured at 106.6 metres above sea level in 2018, and the height shifts from year to year with the wind.

The name comes from the Gascon word pilhar, meaning a heap or mound.

Until the 1930s the dune was known as Les Sabloneys; the modern name was popularised by the property developer Daniel Meller.

On 31 December 2013 a visitor found an Iron Age funerary urn and a small vase, about 800 BC, exposed in the sand.

Archaeologists believe the site once hosted temporary prehistoric camps where people worked at making salt from seawater.

During a storm on 24 January 2009 wind gusts of about 175 km/h were recorded over the dune.

Why it is worth it

At around 105 metres, the Dune of Pilat is the tallest sand dune in Europe, a single ridge stretching nearly three kilometres along the Atlantic coast near Bordeaux. But the number that matters more than its height is its speed: driven by onshore wind, the whole dune creeps inland by four to five metres every year. Sand blows up the gentle seaward slope, piles at the crest, then slides down the far side at angles as steep as 29 degrees — a slow-motion avalanche that never stops.

That migration is documented, not folklore. Maps from 1708 to 1786 show the dune sitting further south, and even further offshore, than where it stands today. Over centuries of that same slow crawl, it has swallowed marshes, buried forests, and covered at least one village on its way inland — the pine forest now growing on its landward flank is essentially next in line.

The dune's layered structure goes back more than 4,000 years, built up through alternating windy, dry stretches and wetter, vegetated ones, each leaving its own band of sediment. Stand on the ridge and look east, at the maritime forest already half-buried at the base, and the dune's future is laid out as plainly as its past.

Good to know

The sand is soft enough that every step forward slides half a step back — climbing to the crest takes longer than it looks.

Best time to visit

Early morning or evening, both for the light over the bay and to avoid midday crowds and heat in summer.

Getting there

7 km from La Teste-de-Buch. Bordeaux–Mérignac Airport (BOD) is about 47 km away.