Rufiji

The Rufiji River runs wholly across Tanzania. It is also the country's biggest and longest river. The confluence of the Kilombero and Luwegu rivers forms the river. It is around 600 kilometers (370 miles) long, with its headwaters in southern Tanzania and its mouth in the Indian Ocean opposite Mafia Island across the Mafia Channel in the Pwani Region. The Great Ruaha River is its main tributary. It is navigable for around 100 kilometers (62 mi). The Rufiji River is located around 200 kilometers (120 miles) south of Dar es Salaam. The delta of the river features the biggest mangrove forest in eastern Africa.

According to the Periplus of the Erythraean Sea, a branch of ancient sea routes led down the East African coast called "Azania" by the Greeks and Romans in the first century CE, at least as far as the port known to the Romans as Rhapta, which was probably located in the Rufiji River delta in modern Tanzania. The river delta was the site of a lengthy naval campaign during World War I, from October 1914 to July 1915. These were the Royal Navy's attempts, and eventual success, in neutralizing and destroying the German cruiser Konigsberg.

Total Length: 373 miles