page_title: La Rioja
section_title: Hydrography
hierarchical_section_title: La Rioja / Geography / Hydrography
caption_attribution_description: English: Detail of a single Dinosaur footprint found in Valdecevillo site, near Enciso, La Rioja, Spain. This is the third footprint on a track of a Theropoda (carnivorous Dinosaur). Español: Detalle de una única huella de dinosaurio encontrada en el yacimiento de Valdecevillo, cerca de Enciso, La Rioja, España. Ésta es la tercera de las huellas de un Terópodo (dinosaurio carnívoro).
context_page_description: La Rioja is an autonomous community and a province in Spain, located in the north of the Iberian Peninsula. Its capital is Logroño. Other cities and towns in the province include Calahorra, Arnedo, Alfaro, Haro, Santo Domingo de la Calzada, and Nájera. It has an estimated population of 315,675 inhabitants, making it the least populated region of Spain.
  It covers part of the Ebro valley towards its north and the Iberian Range in the south. The community is a single province, so there is no County Council, and it is organized into 174 municipalities. It borders the Basque Country to the north, Navarre to the northeast, Aragón to the southeast, and Castilla y León to the west and south.
  The area was once occupied by pre-Roman Berones, Pellendones and Vascones. After partial recapture from the Muslims in the early tenth century, the region became part of the Kingdom of Pamplona, later being incorporated into Castile after a century and a half of disputes.
context_section_description: The Ebro is the main river passing through the community. Emerging from the narrow channel between the rocks of the Conchas de Haro, it reaches La Rioja, through which it runs for 120 km (75 miles), before continuing its journey to the Mediterranean. In the Conchas de Haro the altitude of the river is 445 m (1,460 ft) and when it leaves the community, in the Sotos del Ebro Natural Reserve in Alfaro, it is 260 m (850 ft) high. The river therefore flows very quickly through La Rioja.
  Seven rivers descend rapidly towards the Ebro from the mountain range, which is why La Rioja is sometimes called: "Zone of the seven valleys". They are, from east to west, Alhama, Cidacos, Leza, Iregua, Najerilla, Oja and Tirón, although the headwaters of the Alhama and Cidacos originate in Soria and those of Najerilla-Neila and Tirón are from Burgos. Sometimes Linares (a tributary of Alhama) is added, grouping Tirón with its tributary, the Oja.
  All the rivers of these valleys form tributaries that go on to form many valleys in their own right, such as those of Linares, Ocon, Jubera, Tuerto, Brieva, Viniegras and San Millán. There is an almost unlimited number of grandiose canyons, quite splendid in nature, such as Aguas Buenas, Nieva, Manzanares, Ardancha, Navajún, Valderresa, Ollora, Tobia, San Martín and others.
caption: Footprints of a Theropoda found near Enciso.
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