Guadarrama (river)

{{Expand Spanish|topic=geo|Río Guadarrama|date=June 2014}}

{{Expand Italian|topic=geo|Guadarrama (fiume)|date=June 2014}}

{{Infobox river

| name = Guadarrama

| image = Río Guadarrama Puente Nuevo.jpg

| image_alt =

| image_caption = Río Guadarrama. Community of Madrid, Spain

| map = Guadarrama.png

| map_alt =

| map_caption = Path of the Guadarrama

| name_native =

| name_native_lang =

| name_other =

| source1_location = Siete Picos (Sierra de Guadarrama)

| mouth_location = Tagus

| progression = {{RTagus}}

| subdivision_type1 = Country

| subdivision_name1 = Spain

| subdivision_type2 = Region

| subdivision_name2 = Community of Madrid
Castilla-La Mancha
Province of Toledo

| etymology =

| length = {{convert|131.80|km|mi|abbr=on}}

| source1_elevation = {{convert|1,900|m|ft|abbr=on}}

| mouth_elevation = {{convert|500|m|ft|abbr=on}}

| discharge1_avg =

| basin_size = {{convert|1,708|km2|sqmi|abbr=on}}

| river_system =

| tributaries_left = Aulencia

| tributaries_right =

}}

The Guadarrama is a river in Spain. A tributary of the Tagus, the longest river on the Iberian Peninsula, Guadarrama has its source in the Siete Picos, part of the Sierra de Guadarrama, in the Community of Madrid, in the central part of the country, at an altitude of {{convert|1,900|m|ft}}.