4.6
(216)
3,216
hikers
29
hikes
Hiking around Gistaín, located in the Aragonese Pyrenees, offers a high-mountain environment characterized by peaks ranging from 2,000 to 3,000 meters. The region features numerous glacial lakes, known as "ibones," and extensive forests within its valleys, such as the Cinqueta River valley. This landscape provides a diverse setting for outdoor activities, from challenging ascents to scenic walks.
Last updated: June 23, 2026
5.0
(9)
56
hikers
11.5km
05:18
770m
780m
Hike the difficult 7.2-mile S-11 Viadós Refuge to Ibón de Millares Trail in Posets-Maladeta Natural Park, gaining 2530 feet.
5.0
(1)
26
hikers
18.0km
09:17
1,450m
1,450m
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.

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5.0
(2)
27
hikers
13.9km
06:42
970m
970m
Hike the difficult 8.7-mile Pico Chistau route from Refugio de Viadós, gaining 3168 feet with panoramic views of the Pyrenees.
15
hikers
17.6km
11:25
1,820m
1,820m
Hike to Pico de Posets, the Pyrenees' second-highest peak, on a challenging 10.9-mile circular route through Posets-Maladeta Natural Park.
1.0
(1)
2
hikers
13.9km
07:17
1,200m
1,180m
Hard hike. Very good fitness required. Sure-footedness, sturdy shoes and alpine experience required.
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The moment you leave the Añes cabin, the crossings begin and it is a nice walk.
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Without a doubt, one of the most beautiful valleys in the Pyrenees, with spectacular views of Posets-Espadas.
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Gran Bachimala 3177m, a balcony overlooking the Posets.
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The Viadós refuge is located at an altitude of 1,760 metres, in the Gistau valley, in the Sobrarbe region. It has a capacity for 70 people and has showers, hot water, a bar, food service and blankets. Only in the absence of the guard can an adjacent building be used as a free refuge.
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After a steep climb from the PP you reach the Refugio de Viados and further to Bordas de Viados. From here a great panorama of the Posets Maladeta mountain range opens up. Many paths lead through the mountain range and along the gorge. A splendor of flowers lies at your feet and the snow-covered peaks delight the eye.
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The second highest peak in the Pyrenees, whose ascent is increasingly popular due to the overcrowding of Aneto and being a little more affordable for those who run up it.
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Although on the French side of the Pyrenees it is very common to find dammed lakes, on this side of the mountains it is not so common. The Millares lake is one of the few that is so within the Posets-Maladeta Natural Park, although it is no less beautiful.
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Gistaín offers a wide variety of hiking experiences, with over 25 trails available. These range from easy walks to challenging high-mountain ascents, catering to different skill levels.
The trails around Gistaín are predominantly challenging, with 15 routes rated as difficult and 10 as moderate. There are also 2 easy trails for those seeking a more relaxed experience. The region's high-mountain environment means many routes involve significant elevation gain.
Yes, Gistaín is renowned for its stunning glacial lakes, known as 'ibones'. You can hike to the prominent Ibón de Millares from Refugio de Viadós. Another beautiful option is the Ibón de Lenés, also accessible from Refugio de Viadós. The spectacular Ibón de Plan (Basa de la Mora) is also nearby, reachable from routes starting in Plan and Saravillo.
Yes, the Gistaín region features natural attractions like waterfalls and canyons. You can explore the Gorgas de Calantes Waterfall, or discover the scenic Estós Valley and Ibón de Plan Ravine, which offer diverse landscapes for exploration.
For experienced hikers, Gistaín offers several demanding routes. Consider the ascent to Gran Bachimala or Pico Schrader from Refugio de Viadós, which involves significant elevation gain. Another challenging option is the Pico de Chistau Trail from Viadós Refuge, leading through high-mountain terrain. The Pico de Posets Loop from Viadós is also a very demanding route, offering a circular journey to the second-highest peak in the Pyrenees.
Yes, for those who prefer circular routes, the Pico de Posets Loop from Viadós is a notable option. This challenging trail provides a full circuit around the majestic Pico Posets, offering breathtaking views throughout.
Given Gistaín's high-mountain environment, the best time for hiking is typically during the warmer months, from late spring to early autumn (June to September). During this period, trails are generally free of snow, and the weather is more stable, making high-altitude treks more accessible and enjoyable.
Absolutely. The traditional villages of Plan, San Juan de Plan, and Gistaín itself are connected by pleasant, shorter trails. These routes allow you to experience rural mountain life, admire traditional architecture, and discover the cultural heritage of the valley, including Gistaín's distinctive 'town of the three towers'.
Yes, Gistaín is integrated into the network of long-distance trails. The famous GR 11, also known as the Senda Pirenaica, which traverses the Spanish Pyrenees from west to east, passes through this region, offering opportunities for multi-day treks.
The hiking experiences in Gistaín are highly rated by the komoot community, with an average score of 4.6 stars from over 200 reviews. Hikers often praise the majestic high-mountain scenery, the pristine glacial lakes, and the diverse network of trails that cater to various ability levels.
Gistaín, being part of the Posets-Maladeta Natural Park, generally welcomes dogs on trails, but it's crucial to keep them on a leash to protect wildlife and livestock. Always check specific trail regulations or local signage, especially in protected areas, and ensure your dog is well-behaved and physically capable of the chosen hike.
Many of the more challenging and popular trails in Gistaín, particularly those leading to high-mountain peaks and lakes, start from mountain refuges like Refugio de Viadós. These refuges typically offer designated parking areas for hikers. For routes starting from villages, parking is usually available within or at the outskirts of the village.


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