| Olhadoko erreka | |
| Pushpin Map: | France#France Nouvelle-Aquitaine |
| Source1 Coordinates: | 42.9881°N -0.9581°W |
| Mouth Coordinates: | 43.0178°N -0.9272°W |
| Subdivision Type1: | Country |
| Length: | 9.2km (05.7miles) |
| Source1 Elevation: | 1600m (5,200feet) |
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. It is 9.2km (05.7miles) long.
After joining the Zurkaitzegiko erreka downstream from Larrau, it forms the Gave de Larrau (the upper course of the Saison).
The Olhadoko erreka is formed at the Olhadoko Dam, from the:
Then it is reinforced by the: