The heart of the old colonial city is located on a narrow island (just over 2 km long and about 400 m wide) in the Senegal River, 25 km from its mouth. At this point the river is separated from the Atlantic Ocean to the west by a narrow sand spit, the Langue de Barbarie (300 m wide), which has also been urbanized (the seaside neighborhoods of Ndar Tout and Guet Ndar). Yet a third part of the city, Sor, lies on the eastern mainland and is nearly surrounded by tidal marshes. Saint-Louis is situate on the Mauritanian border, though the border crossing is at Rosso, 100 km upstream.
Three characteristics give Saint-Louis its distinctive geographic appearance: the Sahel, the marshes and the Langue de Barbarie.
Saint Louis, infos taken from
Wikipedia. -
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