Although it is the smallest one, it has the same rough and wild look, specially when viewed from the Atxarte pass that separatest the mountain from the neighbouring Untxillaitz. It has a double summit, highest is Aitz Txiki and the lower one (790m) is Artxua or Sorginkobetagana. It is rough and difficult from all sides except the one faced to Atxarte, which is the main access route. There are remains of a castle that was used to watch the Atxarte pass.