The Larrau River is a small river located in the Pyrenees mountain range, primarily flowing through France and Spain. It is a tributary of the Nive River, contributing to the region's hydrology. The river is known for its picturesque landscapes and is surrounded by lush greenery and mountainous terrain. The Larrau River originates near the Larrau Pass, which connects the two countries. It flows through the Valley of Larrau before merging with the Nive. The river is popular for outdoor activities such as hiking and fishing, attracting nature enthusiasts and tourists alike.