This valley is located in north-west Navarre in Temperate Navarre. Between the Aralar mountain range and the Urbasa-Andía Natural Park, the Sakana valley covers approximately 306 square kilometres. The river Arakil runs through it and it is surrounded by spectacular mountains full of beech and oak forests such as Beriain-San Donato or La Trinidad. The territory covers three historical areas: La Burunda, Aranatz and the Arakil valley. Its major towns and villages include Altsasu/Alsasua, Etxarri-Aranatz, Uharte-Arakil, Irurtzun, Bakaiku, Arbizu and Olazti/Olazagutía.
