NEW Aneto Exploration Trek

This is a short day to get the legs warmed up, with a steady but manageable climb from Eriste to Cerler. To start the trek, you make your way to Eriste and begin walking from there. The route covers 6.02 km and gains 500 m, so the effort is clear but compact. Most of the height gain comes gradually as you leave the valley and work up towards the village.

From Eriste, the route heads east along the valley side, passing near the tourist information point before continuing towards Anciles. You walk past the streets of Anciles and the Anciles playground, then leave the lower villages behind. The trail climbs through Remáscaro and past a panoramic trekking route section, before reaching the area around Remáscaro Gorge Waterfalls on the final approach to Cerler.

You arrive in Cerler at your hotel, after a short but steady climb from the valley. If you still have energy left after checking in, you can follow route option 2 and do the loop trek to Ardonés Waterfall.

This is a demanding mountain stage with a big climb from Cerler into higher terrain. The ascent is over 1000 m, so pace yourself from the start and keep some energy for the second half. The route begins steadily from the village, then works higher across open slopes before reaching more technical ground. The last 5 km are over T3 terrain, so expect a rougher, more exposed finish where sure-footed walking matters.

From Cerler, the trail climbs east above the valley, passing viewpoints towards Pico Cerler and the Ardonés area. The route continues across the mountainside towards Tuqueta Blanca, then crosses higher ground near Collada de Llauset and Pico Llauset. This middle and final section gives the stage its alpine character, with sustained height, stony paths and several changes in direction as you move towards the lake basin near the hut.

In the final kilometres, the route continues above Ibón de Llauset before the last approach to Refugio Cap de Llauset. You arrive at the hut in a high mountain setting, a good place to rest after the long climb and the technical T3 finish.

This stage leaves the high mountain setting of Refugio Cap de Llauset and works gradually back down towards the Estós valley. Although the climbing is limited, the day is defined by a long descent, so take care with your footing and avoid rushing the steeper sections. The section around Vallibierna Pass is over T3 terrain, adding a more technical start before the route settles into the long descent west.

From the hut, the trail heads past Estany Cap de Llauset and climbs towards Vallibierna Pass before beginning the long descent. You pass Lower Vallibierna Lake and continue into the Vallibierna Valley, with Río de Vallibierna guiding much of the middle section. Further down, the route passes Pleta del Quillón, then keeps descending through narrower valley terrain towards the Estós River and Estós Reservoir.

The final stretch brings you out near the road and down to Parking de Estós. After the long descent from the high mountains, this is a clear and practical finish point for the route.