Río Plentzia is a river located in the Basque Country of Spain. It flows through the municipality of Plentzia and eventually empties into the Bay of Biscay. The river is approximately 10 kilometers long and is known for its scenic beauty and natural surroundings. The river's basin supports diverse flora and fauna, making it an important ecological area. It is also a popular spot for outdoor activities such as hiking and kayaking. The surrounding landscape features lush greenery and picturesque views, attracting both locals and tourists to enjoy its tranquil environment.