Douro

The second one in Top 10 Longest Rivers in Portugal that Toplist would like to introduce to you is Douro. The Douro is the Iberian Peninsula's highest-flowing river. It springs near Duruelo de la Sierra in the province of Soria in central Spain, meanders south briefly, then flows west across northern Spain and northern Portugal to its mouth at Porto, Portugal's second largest city. It meets the Atlantic Ocean at its mouth.

The scenic Douro railway line, tourism in general, and – relatedly – the creation and production of port – a mildly fortified wine –, grapes, conventional wines, and other agricultural produce are all notable. The Côa Valley Paleolithic Art site, a UNESCO World Heritage Site, is located on a minor branch of the river and is deemed important to the archaeological prehistoric patrimony. It runs across the centre of the autonomous community of Castile and León in Spain, with the basin comprising the northern half of the Meseta Central. Wine-producing regions such as the Ribera del Duero DOP are included in this category.

After the Tagus and the Ebro, it is the third-longest river in the Iberian Peninsula. It has a total length of 897 kilometers (557 miles), of which only sections of the Portuguese section are naturally navigable by small rivercraft because they are below a fall/rapids line.

Length: 897 km (557 mi- shared with Spain)