Cidacos

{{Short description|Spanish river}}

{{Single source|date=November 2024}}

{{Use dmy dates|date=November 2024}}{{Infobox river

| name = Cidacos River

| native_name = {{native name|es|Río Cidacos}}

| image = Rio.Cidacos.Arnedo.La.Rioja.España.jpg

| image_caption = Cidacos river in Arnedo (La Rioja).

| subdivision_type1 = Country

| subdivision_name1 = Spain

| subdivision_type2 = Region

| subdivision_name2 = Castile and León Soria, La Rioja

| source1 =

| source1_location = Puerto de Oncala

| mouth_location = Ebro

| progression = {{REbro}}

| source1_elevation = {{convert|1425|m|abbr=on}}

| mouth_elevation = {{convert|290|m|abbr=on}}

| length = {{convert|82.8|km|mi|abbr=on}}

| basin_size = {{convert|696|km2|abbr=on}}

| discharge1_avg = {{convert|2.7|m3/s|cuft/s|abbr=on}}

|map = CuencaDelEbrov1.svg

|map_size = 280px

|map_caption = Cidacos river location in the Ebro basin

}}

The Cidacos River is a tributary of the Spanish Ebro River.{{Cite web |title=River Cidacos Nature Trail |url=https://caminosnaturales.es/en/red-de-caminos-naturales/camino-detalle/sector-noreste/rio-cidacos |access-date=2 November 2024 |website=Camino Naturales}} Its source is Los Campos, in Soria, and it flows for {{Convert|77|km}} until it reaches the Ebro at Calahorra, La Rioja.

It flows through or past various towns like Villar del Río, Yanguas, Enciso, Peroblasco, Arnedillo, Santa Eulalia Somera, and Bajera, Herce, Arnedo, Quel, Autol, and Calahorra. The river is used for irrigation purposes and is often dried up near Calahorra.