Aren is located some 14 km north-west of Oloron-Sainte-Marie immediately south of Saucède. The commune is divided into two portions - the eastern portion contains the village and is bordered in the north and east by the Gave d'Oloron. This portion is connected to the western part located to the west of the Joos river by the D325 road (which is part of the commune). Access to the commune is by the D936 road which crosses the "neck" of the commune and connects to the D325 road which goes east to the village. The D59 road also goes from the village south-west to Saint-Goin. The D25 also connects the "neck" of the commune to Préchacq-Josbaig in the north and crosses the Gave-d'Oleron north of this village - the nearest river crossing to the commune.[4] The eastern portion of the commune consists of the village and farmland. The western portion, which has no hamlets, is heavily forested with some 30% of farmland.
The commune lies in the Drainage basin of the Adour and the Gave d'Oloron flows from south to north then turns east at the northern border of the commune. The Joos river flows north across the "neck" of the commune and joins the Gave-d'Oloron north of Prechacq-Josbaig. In the western portion of the commune numerous streams rise including the Ibarle and the Larribau which all flow north eventually to join the Gave d'Oloron.
Paul Raymond noted on page 9 of his 1863 dictionary that in 1385 Aren had 23 fires and depended on the bailiwick of Oloron. The barony, which was established in 1658, was a vassal of the Viscounts of Béarn.[5]
Economic activity is mainly agricultural (livestock, pasturage, polyculture). The town is part of the Appellation d'origine contrôlée (AOC) zone designation of Ossau-iraty.
A village festival takes place on the last Sunday of June .
Civil heritage
The Chateau of Aren (15th century) is registered as an historical monument.[17]
There are several old houses in the village which were counted in the census of Gaston Fébus in 1385 called Ploo, Carrere, and Paletz. Under the Viscounts of Béarn the inhabitants of Jaca were relocated to the commune and the mode of construction of the houses, uniquely in the Josbaig Valley, is similar to the Canfrance region and Jaca.[18]
Religious heritage
The Church of Saint John the Baptist (19th century) is registered as an historical monument.[19]
Environmental heritage
The hiking trail GR78 crosses the territory of the commune.[20]