The Lys valley,
a natural setting in the heart of the Pyrenees

A landscape shaped by water and mountains

The Lys stream, which crosses the valley before joining the Pique, plays a key role in shaping the landscape. The water has sculpted the rocks and carved out gorges where several waterfalls nestle. Among them, the Cascade d’Enfer is one of the most impressive. Its powerful flow, reinforced by the melting snow in spring, creates a breathtaking spectacle. Other waterfalls dot the valley, providing welcome coolness in summer.

As you climb higher, the landscape changes. Forests of beech and fir give way to alpine meadows and scree, home to a number of plant species adapted to extreme conditions. The peaks that frame the valley, such as those of the cirque des Crabioules, mark the transition to the more mineral landscapes of the high mountains.

Biodiversity between forests and peaks

The diversity of natural habitats in the Vallée du Lys makes it a haven for many species. The forests are home to deer and roe deer, as well as more discreet species such as the capercaillie. In the clearings and moors at high altitude, isards roam in small groups, while marmots signal their presence with their characteristic whistling.

In the sky, it is not uncommon to spot birds of prey in search of prey. The golden eagle soars over the ridges, while the bearded vulture, a large scavenger, plays an important role in the ecosystem by feeding on the bones left behind by other predators.

In terms of flora, the valley is home to species adapted to mountain environments. Plants such as cottongrass, recognisable by its cottony tufts, can be found near streams. Higher up, on the rocky slopes, flowers such as Androsace des Pyrénées and intermediate saxifrage can withstand the harsh climate.

A region
marked by pastoralism

As in many Pyrenean valleys, livestock farming has long been a feature of local life. High altitude pastures, known as estives, are still used for rearing ewes and cows during the summer. This activity helps to maintain open landscapes and limits the encroachment of shrubbery on the meadows.

The shepherd’s huts dotted around the valley bear witness to this pastoral presence. Some are still used by farmers, while others have been restored to welcome walkers or to provide shelter in bad weather.

An unspoilt valley
accessible all year round

The Lys valley attracts many visitors, but it remains a protected area where human impact is limited. Information boards remind walkers of the importance of respecting the local flora and fauna, in particular by staying on the signposted paths and avoiding disturbing wild animals.

Although the valley is very popular in summer, it is also interesting at any time of year. In spring, the melting snow swells the waterfalls and transforms the landscape into a lush green setting. In autumn, the forests turn ochre and gold. In winter, although access is more difficult, the snow-covered landscapes give the valley a completely different look, making it ideal for snowshoe outings or for observing wildlife adapted to winter conditions.

The Vallée du Lys is a place where nature and pastoral history come together in perfect harmony. With its waterfalls, forests and mountain paths, it’s a great gateway to the Pyrenees, without the need to travel long distances or climb steep peaks.