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Sarpourenx is located in the historic former province of Béarn, on the left bank of the river Gave de Pau. Its territory includes at least one small hamlet, Le Gave, and a tributary stream of the Gave de Pau, Géu Mort. Neighboring communes include Castétis (north), Argagnon (east), Biron (west), Castetner (west), Maslacq (south), and Orthez (southeast). Via road, Sarpourenx is accessible by Departmental Route 9, near exit 8 of Autoroute A64.