The Cidacos River is a tributary of the Ebro. Its source is

Los Campos LOS, or Los, or LoS may refer to: Science and technology * Length of stay, the duration of a single episode of hospitalisation * Level of service, a measure used by traffic engineers * Level of significance, a measure of statistical significance ...

, in

Soria Soria () is a municipality and a Spanish city, located on the Douro river in the east of the autonomous community of Castile and León and capital of the province of Soria. Its population is 38,881 ( INE, 2017), 43.7% of the provincial popula ...

, and it flows for 77 km (48 mi) until its reaches the Ebro at Calahorra (

La Rioja La Rioja () is an autonomous community and province in Spain, 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, a ...

). It flows through or past various towns like

Villar del Río Villar del Río is a municipality located in the province of Soria, Castile and León, Spain. According to the 2004 census ( INE), the municipality has a population of 172 inhabitants. Villages *La Cuesta La Cuesta is a district of the Cor ...

Yanguas Yanguas is a municipality located in the province of Soria, Castile and León, Spain. According to the 2004 census (INE INE, Ine or ine may refer to: Institutions * Institut für Nukleare Entsorgung, a German nuclear research center * Instit ...

, Enciso,

Peroblasco Peroblasco is a village in the municipality of Munilla, in the province and autonomous community of La Rioja, Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_mot ...

Arnedillo Arnedillo is a village in the province and autonomous community of La Rioja, Spain. It is crossed by the Cidacos River. The municipality covers an area of and as of 2011 had a population of 477 people. Arnedillo is famous for its hot springs ...

Santa Eulalia Somera Santa Claus, also known as Father Christmas, Saint Nicholas, Saint Nick, Kris Kringle, or simply Santa, is a legendary figure originating in Western Christian culture who is said to bring children gifts during the late evening and overnigh ...

, and Bajera, Herce, Arnedo, Quel,

Autol Autol is a village in the province and autonomous community of La Rioja, Spain. River Cidacos flows by the town. There are original rock formations close to Autol. The municipality covers an area of and as of 2011 had a population of 4458 p ...

, and Calahorra. The river is used for

irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been dev ...

purposes and is often dried up near Calahorra.

See also