Benasque falls more or less in the middle of the trans-Pyrenean GR11 trail, making the town a popular resting spot for hikers, whether for one or more nights. One of the best ways of exploring the surrounding wilderness is to use the many refuges dotted around Benasque as your base.
One of the more popular treks is northwest of Benasque, along the Estós valley to the Refugio de Estós, a three-hour trek. You can then continue over the Puerto de Gistaín to the Refugio de Viadós, which takes another 5 hours. Viadós is a base for treks up Posets, but again, this is a serious undertaking, and you’ll need all the proper equipment to do this climb.
An alternative to this route (though best if you’re in tip-top shape, because it can be challenging) is northwest up the Eriste valley, 4km southwest of Benasque, and then over the Collado de Eriste before descending to Viadós. Along this route, you can stop at the Refugio Ángel Órus.
North of Benasque lies the lush Upper Esera valley and massive Maladeta massif. A small hub is La Besurta, about 16km northeast of Benasque (and linked by buses in summer), which has parking and a small hut/bar with food and supplies (summer only) and is a gateway to hikes in the area. A good base is Hotel-Spa Hospital de Benasque, about 3km before you reach La Besurta. In the summer, buses connect Benasque to La Besurta (€11 round trip) and also to Valle de Vallibierna and the Refugio Pescadores, 11km northwest of Benasque.