Gállego is a river located in the northeastern part of Spain, primarily flowing through the region of Aragón. It is a tributary of the Ebro River and plays a significant role in the local ecosystem. The river is approximately 120 kilometers long and is known for its scenic landscapes and diverse wildlife. The Gállego River is also associated with the Gállego Valley, which is popular for outdoor activities such as hiking, fishing, and kayaking. The surrounding area features picturesque villages and historical sites, making it a destination for both nature lovers and cultural enthusiasts.