Which river is the longest in Spain?

Which river is the longest in Spain?

• A. Ebro River
• B. Duero River
• C. Guadalquivir
• D. Tajo

Answer: (A)

Think about how we define “longest in Spain.” If we mean the river’s entire course lies within Spanish borders, the Ebro fits that best. It runs from the northern mountains to the Mediterranean coast, totaling about 910 kilometers, and is entirely contained in Spain. Other rivers either don’t reach as far within Spain or, even if they are longer overall, spend a large portion of their length outside Spain (for example, crossing into Portugal). The Guadalquivir is shorter, so it can’t surpass the Ebro within Spain. So, by measuring the length of rivers that stay entirely in Spain, the Ebro is the longest.

Think about how we define “longest in Spain.” If we mean the river’s entire course lies within Spanish borders, the Ebro fits that best. It runs from the northern mountains to the Mediterranean coast, totaling about 910 kilometers, and is entirely contained in Spain. Other rivers either don’t reach as far within Spain or, even if they are longer overall, spend a large portion of their length outside Spain (for example, crossing into Portugal). The Guadalquivir is shorter, so it can’t surpass the Ebro within Spain. So, by measuring the length of rivers that stay entirely in Spain, the Ebro is the longest.