De las Damas

From the Arbeltz bend at Km. 23.7 on the Lizarraga road, take the Sosa and Ikomar track. Past the Sosa open ground, the track narrows into a small valley that leads to the Ikomar open ground. From the entrance of the narrows, a track heads northeast toward Iriturri. After about 800 m you reach the Zamargile and Ricardo huts; from the latter, continue over open terrain about 500 m to the northeast, beneath the crest of Tontorraundi, where the cavity is found.