It rises at Goizbide in the woods above Ustaritz and Saint-Pée-sur-Nivelle, where it is known as the Apalagako erreka.

It collects waters from the Alhorgako Erreka and drains the plain of Belhardi in the north of Ahetze, before flowing into the Bay of Biscay in Bidart.
It rises at Goizbide in the woods above Ustaritz and Saint-Pée-sur-Nivelle, where it is known as the Apalagako erreka. 
It collects waters from the Alhorgako Erreka and drains the plain of Belhardi in the north of Ahetze, before flowing into the Bay of Biscay in Bidart.
Uhabia