Gave de Larrau

{{Infobox river

| name = Gave de Larrau

| image =

| image_caption =

| pushpin_map = France#France Nouvelle-Aquitaine

| source1_location = Larrau

| mouth_location = Saison

| mouth_coordinates = {{coord|43|2|53|N|0|53|10|W|region:FR|display=inline,title}}

| progression = {{RSaison}}

| subdivision_type1 = Country

| subdivision_name1 = France

| length =

| mouth_elevation = {{convert|300|m|ft|abbr=on}}

| discharge1_avg =

| basin_size =

}}

The Gave de Larrau is a torrential river of the French Basque Country (Pyrénées-Atlantiques), in the southwest of France. It is the left tributary of the river Saison, and considered its upper course by Sandre.{{sandre|id=Q7--0250|nom=Le Saison}} Its name is due to the village of Larrau.

It is formed from the confluence of the Zurkaitzegiko erreka and the Olhadoko erreka. After joining the Uhaitxa, from Sainte-Engrâce, it forms the Saison in Licq-Athérey.

Tributaries: Etxelüko erreka, Ahuntzolako erreka