Mountain range of Tendeñera Nature · Biescas, Alto Gállego, Huesca The Sierra de Tendeñera is an inner Pyrenean mountain range located in the Huesca districts of Alto Gállego and Sobrarbe, north of Biescas, on the boundary of the Ordesa y Monte Perdido National Park. It stretches about 15 kilometres from west to east, from Santa Elena, at the entrance to the Tena valley, to Bujaruelo. Its highest peak is the punta Tendeñera, at 2,853 metres, along with others such as peña Sabocos (2,757 m) and punta de la Ripera (2,823 m); on this peak and on the Vachesango peak the contact between the flysch formations and the limestones of the inner ranges is exposed. Declared a Special Area of Conservation under the Natura 2000 Network, it is home to twenty-eight mountain plant species, including the moss Buxbaumia viridis, and is a passage site for fifty-seven bird species. Photo: Tigerente (CC BY 4.0) What to see and do in Biescas