The Escuaín car park is about two hundred meters before reaching the town, at the beginning of a mountain forest track that leaves the road to the left and goes up towards the high pastures of the valley and the Yaga river canyon, known as the Garganta of Escuain. It is one of the smallest and most remote valleys in the Ordesa y Monte Perdido National Park. Milestones and red and white markings of the GR-15 long-distance path appear in the car park. The route leaves the car park along the main path and immediately the turnoff for the GR-15 that goes up the mountainside appears on the left. The slope is quite hard to start the route with cold legs and you can follow different paths with more or less slope and route according to the taste and physical level of each one. At first the path climbs up a slope of old terraces, known in these mountains as fajetas, and then continues through the forest. The red and white markings of the GR-15 are painted on the trunks of the trees. The GR-15 Pre-Pyrenees Trail is one of the great hiking itineraries in the Pyrenees, it runs between the mythical crossing of the GR-11 Pyrenean Trail and the GR-1 Historical Trail.