El Pas de la Casa is a ski resort (part of the Grandvalira resort), town, and mountain pass in the Encamp parish of Andorra, lying on the border with France. Its name literally translates as "the pass of the house" and refers to the fact that until the early twentieth century there was only a single shepherd's hut overlooking the pass. The pass marks the watershed of the Pyrenees, being the only point in Andorra where water drains into the Atlantic Ocean, and is the source of the Ariège river. At an elevation of 2408 m, it is one of the highest points on the European road network. The pass is bypassed by the Envalira Tunnel.
The ski resort of Pas de la Casa sits below the pass on the side closest to France, and below the Pic d'Envalira (2827 m). Its first ski lift was opened in 1957 and currently it counts 31 lifts, 100 km of pistes and 6.26 km² of skiable terrain. The highest skiable point is 2640 m. Its popularity has grown with the burgeoning ski and snowboard industry in the principality: it is the highest resort in Andorra, has the best snow record, and is the easiest to get to from Barcelona or Toulouse airports. Consequently it attracts a large number of British and Irish winter sports enthusiasts, as well as French and Spanish. It is also favoured for its southern latitude and duty-free status, which for many overcome the drawbacks of the long airport transfer times.