The Oiartzun River () is a short river in the
Basque Country in the north of the
Iberian Peninsula
The Iberian Peninsula (),
**
* Aragonese and Occitan: ''Peninsula Iberica''
**
**
* french: Péninsule Ibérique
* mwl, Península Eibérica
* eu, Iberiar penintsula also known as Iberia, is a peninsula in southwestern Europe, defi ...
. It is the smallest river of
Gipuzkoa
Gipuzkoa (, , ; es, Guipúzcoa ; french: Guipuscoa) is a province of Spain and a historical territory of the autonomous community of the Basque Country. Its capital city is Donostia-San Sebastián. Gipuzkoa shares borders with the French depa ...
flowing into the
Bay of Biscay
The Bay of Biscay (), known in Spain as the Gulf of Biscay ( es, Golfo de Vizcaya, eu, Bizkaiko Golkoa), and in France and some border regions as the Gulf of Gascony (french: Golfe de Gascogne, oc, Golf de Gasconha, br, Pleg-mor Gwaskogn), ...
(
Atlantic
The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe an ...
basin); the river joins the sea at the Bay of
Pasaia
Pasaia ( es, Pasajes) is a town and municipality located in the province of Gipuzkoa in the Basque Autonomous Community of northern Spain. It is a fishing community, commercial port and the birthplace of the famous admiral Blas de Lezo.
Pasaia l ...
. The Oiartzun rises in the
Aiako Harria massif at an altitude higher than 700 m. It flows down through steep slopes and falls, with an average drop to its mouth of 5.49% (600 m drop in the first 5 km).
The river meanders through the valley and several hamlets of the
town
A town is a human settlement. Towns are generally larger than villages and smaller than cities, though the criteria to distinguish between them vary considerably in different parts of the world.
Origin and use
The word "town" shares an ori ...
of the same name. On its last stage, it crosses the A-8 motorway squeezed up into a canal all along
Errenteria
Errenteria ( eu, Errenteria/Orereta, es, Rentería) is a town located in the province of Gipuzkoa in the Basque Autonomous Community, in the north of Spain, near the French border. The river Oiartzun cuts its way through the town, one that has ...
, before joining the Bay of Pasaia. The river underwent severe environmental problems on its last 10 km during the whole 20th century, especially on account of the paper mill located in Errenteria, while the issue was largely redressed by the early 21st century.
Rivers of the Basque Country (autonomous community)
Gipuzkoa
Rivers of Spain
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