Major River Systems of Spain

Spain's geography is defined by several significant river systems. The five longest rivers are:

• Ebro River: 930 km, flowing through Cantabria, Castile and León, La Rioja, Navarre, Aragon, and Catalonia.
• Duero River: 897 km, crossing Castile and León into Portugal.
• Tagus River: 1,007 km, traversing Aragon, Castile-La Mancha, Extremadura, and Portugal.
• Guadiana River: 744 km, through Castile-La Mancha, Extremadura, and Andalusia.
• Guadalquivir River: 657 km, flowing through Andalusia.

These rivers are vital for agriculture, hydroelectric power, and regional ecosystems.