Rio Oja is a river in the La Rioja province of northern Spain. It flows through the Oja Valley past the town and municipality of Ezcaray

Ezcaray

Ezcaray is a town and municipality in the Oja Valley in the La Rioja region of northern Spain.The name is of Basque origin.The town is situated at the base of the San Lorenzo peak and is 13 km from the Valdezcaray ski area.-External links:*...

. It is generally accepted to have given its name to the famous wine of the Rioja DO, although there are other theories. The Oja flows into the Tirón River east of Cihuri

Cihuri

Cihuri is a village in the province and autonomous community of La Rioja, Spain....

, and the Tirón flows into the Ebro immediately north of Haro

Haro, La Rioja

Haro is a town and municipality in the northwest of La Rioja province in northern Spain. It is known for its fine red wine and every year the Haro Wine Festival is held where locals hold a wine battle....

.