The Najerilla River is a river located in northern Spain, primarily flowing through the region of La Rioja. It is a tributary of the Ebro River, contributing to the river system that supports the surrounding ecosystems and agriculture. The river is approximately 60 kilometers long and is known for its scenic landscapes and natural beauty. The Najerilla River originates in the Sierra de la Demanda mountains and flows through several towns, including Najera, which is named after the river. The river is popular for recreational activities such as fishing and hiking, attracting both locals and tourists who enjoy its tranquil environment.