Olhadoko erreka

Olhadoko erreka
Origin	Pic d'Orhy 42°59′17″N 0°57′29″W / 42.98806°N 0.95806°W / 42.98806; -0.95806
Mouth	Gave de Larrau 43°1′4″N 0°55′38″W / 43.01778°N 0.92722°W / 43.01778; -0.92722
Basin countries	France
Source elevation	1 600 m

The Olhadoko erreka is a torrential river of the French Basque Country (Pyrénées-Atlantiques), in the Southwest of France, that flows through the Holtzarte Canyon.

After joining the Zurkaitzegiko erreka downstream from Larrau, it forms the Gave de Larrau.

The Olhadoko erreka is formed at the Olhadoko Dam, from the:

• Bagosudurreko erreka, from Sakhondoa,
• Zitziratzeko erreka, from Üthürzeheta and Zitziratzea,
• Betzulako erreka from the Betzula valley.

Then it is reinforced by the:

• (R) Ardaneko erreka,
• (L) Uztarbeko erreka,
• (R) Olhadübiko erreka.