El Pas de la Casais askiresort(part of theGrandvaliraresort), town, and mountain pass in theEncampparishofAndorra, lying on the border withFrance.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 thewatershedof thePyrenees, being the only point in Andorra where water drains into theAtlantic Ocean, and is the source of theAriège river. At an elevation of 2,408 metres (7,900ft) it is one of the highest points on the European road network. The pass is bypassed by theEnvalira Tunnel.