Urederra (from the basque; ur- “water”, -ederra “beautiful”) is the natural exit of the aquifer created in the rock massif karst of Urbasa, Navarre. The river rises in The Natural Park of Urbasa-Andía (Sierra de Urbasa), near the village Baquedano.
It is 19 km long and flows into the Ega River, which is a tributary of the Ebro. The first emerge is produced in a 713 meters high cliff in the southern ledge of the rock massif and makes a more than 100 meters waterfall which, with the passing of the years has modelled a rocky and karstic landscape.
Behind the waterfall, there are some smaller waterfalls and a lot of river pools, whose water has a unique turquoise colour, which is a remarkable feature of the Urederra River.
Because of the karst, the small waterfalls and pools have been made. The karstic area also enables water to strain through the cracks of the rocks and issuing from inside the land.