Biescas is a municipality of northeastern Spain close to the border with France, in the midst of the Pyrenees in the province of Huesca. The name seems to provide from the term bizka, which means "hill" in a Proto-Indo-European language.

The town of Biescas is located at 875 meters altitude on the banks of the Gallego river. The municipality extends along a small plain and includes the canyon to access to the Tena Valley. At 72 km north of the main city Huesca, Biescas is a communication hub between the regions of Jacetania and Sobrarbe. The town is strategically located to crossing the Gallego river, as a link between the valleys of Tena and Ara.