The Urumea is a river in the Basque Country at the north of the Iberian Peninsula. Its one of a series of Basque rivers flowing into the Bay of Biscay (Atlantic basin) and is best known for being the river flowing towards the sea by the city of San Sebastian.
The river is 59.4 km long from its source in the Navarrese municipality of Goizueta, and 33 km of it runs through the province of Gipuzkoa. The average temperature is 13.5 °C. The seasonal and year-to-year variations in water flow are less marked than in other basins of Gipuzkoa, and the natural regulation of this basin is very high.
The current water quality allows for a stable fish fauna with five species populating the river, namely salmon, trout, common minnow, loach and eel.
