Input (grade 12): It flows through cities such as Miranda de Ebro, Logroño, Zaragoza, Flix, Tortosa, and Amposta before discharging in a delta on the Mediterranean Sea in the province of Tarragona.
Output (grade 4): It flows through Reinosa, Miranda de Ebro, Logrono, Tudela, Zaragoza, and Tortosa.