Barcus (; ) is a commune in the Pyrénées-Atlantiques department in the Nouvelle-Aquitaine region of southwestern France in the former province of Soule. The inhabitants of the commune are known in French as Barcusiens or Barcusiennes and in Basque as Barkoxtar. Geography Location Barcus is located in the Massif des Arbailles in the former province of Soule some 25 km south by south-east of Sauveterre-de-Béarn and 12 km west of Oloron-Sainte-Marie. The commune covers a complex of valleys formed by the course of the Joos and its left and right tributaries - the Paradis district, for example, is located on the Ibarra and the former hamlet of Guibelhéguiet is on a tributary of the Joos. Access Access to the commune is by the D24 road from Chéraute in the west which passes through the centre of the commune and continues east to Esquiule. The D347 branches from the D26 west of the village and goes south to Tardets-Sorholus. The D59 comes from Saint-Goin in the north-east through the village and continues south down the eastern side of the commune to Montory. The D859 branches off the D59 in the north of the commune and goes north to join the D25 north of the commune. The D159 branches off the D59 halfway down the commune and goes east to join the D24 east of Esquiule. The D459 branches off the D59 in the south of the commune and goes south-east to Lanne-en-Barétous. Hydrography The commune is located in the drainage basin of the Adour. The Joos river rises west of the commune and flows east across the commune then north, forming the eastern border of the commune, continuing north-east to eventually join the Gave d'Oloron at Préchacq-Josbaig. Many tributaries rise in the commune and flow east into the Joos including the Bouhatéko erreka, the arréc of Etchanchu, the Handia, the Oyhanart erreka, the arriou of Soulou, the Sustaris erreka, and the Ibarra stream (7 km long) with its tributaries, the Ruisseau Ibarra (4.4 km, which is joined in the commune by the Askontchilo erreka and the Athaketa stream) and the Lecheguita stream (also with its tributary the Ilharra stream). Paul Raymond mentioned another tributary of the Joos crossing Barcus called the Guibéléguiet with its tributary the Paradis. Tributaries of the Lausset, which also flows into the Gave d'Oloron, also pass through the commune such as the Ascania stream and the Ibarle