Lai dalla Stria

Lai dalla Stria, known in German as Hexensee or "Witches' Lake", is a high alpine lake in the municipality of Tujetsch, in the Swiss canton of Graubünden. It sits in the Val Milà at roughly 2,500 metres above sea level, south of the Chrüzlistock peak. No road leads to it. You reach the shore on foot, and the outing fills a whole day.

What will you see at Lai dalla Stria?

The lake is small but striking. Pale, rounded rocks along the shore stand out against deep blue water. On a windless day the surface mirrors the cliffs of Piz Nair, which makes it a favourite with photographers. The surrounding rock is rich in minerals, and the Sedrun area runs a permit system for crystal hunting. A day permit costs about CHF 30 at the Sedrun tourist office.

How do you get to Hexensee?

The most common route begins in Rueras, in the Tavetsch valley. You can reach Rueras by train or by car from Andermatt or Disentis. The trail climbs through the Val Milà, covers about 14.6 km and gains around 1,080 m in total, with a high point near 2,485 m. A second option starts at Alp Caschlé. It is graded difficult and demands sure footing, sturdy boots and alpine experience. Part of it follows a newly marked blue-and-white trail without a worn path, with views toward the Oberalpstock.

When should you go?

The lake is normally free of snow from early July, though snowfields nearby can last longer. Start early in the morning. Winds are usually calmer before midday, so you have a better chance of glassy water and clear reflections. Carry extra layers, water and food, since the sources mention no mountain hut along the way.

What else is nearby?

About 15 minutes on foot to the north, at the foot of the Chrüzlistock, lies Lai Selvadi. Tujetsch has Sedrun as its main village, and the Romansh-speaking community there gave the lake its name: lai means "lake" and stria means "witch".

Frequently asked questions

Can I drive to the lake? No. Both routes, from Rueras and from Alp Caschlé, are on foot and take most of a day.

How long and how hard is the hike? The Rueras route is about 14.6 km with around 1,080 m of ascent. The Alp Caschlé variant is rated difficult and needs mountain experience.

What is the best season? July onward, once the shore has usually cleared of snow. Set off early for calm water.

Can I look for crystals here? Yes, but you need a day permit from the Sedrun tourist office.