Val Fex (Romansh; German: Fextal) is a southern side valley from the Upper Engadine in Switzerland, located at an altitude of around 1,800 to 2,000 metres (5,900–6,600 feet) above sea level.
At the very end one finds the Alp Muot Selvas (2,070 m (6,790 ft)) at the former (about 150 years ago) foot of the glaciers.
The river Fedacla runs through the valley, starting at the feet of the three glaciers roughly from south to the north and enters the Lej da Silvaplauna in the Upper Engadine.
There are two small guest houses / hotels in the valley.
A popular local attraction is a tour of the valley by horse sleigh out of Sils, during both summer and winter.