Niger River
West Africa's great river, looping through the desert's edge
The Niger draws one of the strangest courses of any major river: rising just 240 kilometers from the Atlantic in the Guinea highlands, it turns inland and runs northeast into the Sahara before swinging back south to reach the sea through an enormous delta. That great boomerang took early geographers centuries to map. West Africa's longest river, it has sustained empires, trade cities and millions of farmers and herders along the edge of the desert.
The Niger runs about 4,180 kilometers from the Fouta Djallon highlands to the Gulf of Guinea. Its most remarkable feature is the Inner Niger Delta in Mali, a vast inland floodplain where the river spreads into lakes and marshes at the threshold of the Sahara, a green oasis that swells and shrinks with the rains. From there the river bends past Timbuktu and Gao, turns south through Niger and Nigeria, and finally fans into the true Niger Delta, a sprawling maze of creeks and mangroves on the Atlantic coast.
The river's great bend cradled the medieval empires of Mali and Songhai, whose wealth in gold and salt flowed through river ports like Djenne and Timbuktu. Today the lower delta is the center of Nigeria's oil industry, and the contrast is stark: petroleum wealth alongside chronic spills, pollution and unrest. Upstream, dams and the demands of a fast-growing population press on a river whose floods still govern fishing, farming and grazing across the Sahel.