It stretches from the Gulf of Guinea in the southwest to Lake Chad in the northeast
The South African coast stretches 2,798 kilometres and 
borders both the... [DOC] [TLE] The Sahara Desert: Location, Landscape, Water and Climate ... [PAR] Its highest point is Chad's Mount Koussi (an extinct volcanic crater that rises 
11,204 ... southwest of the Sahara, and flows northeastward into Mali and the 
desert then turns southeastward, through Nigeria, and empties into the Gulf of 
Guinea.