The Gulf of Cádiz (in Spanish: Golfo de Cádiz) is the arm of the Atlantic Ocean between Cabo de Santa María (Cape of St. Mary), the southernmost point of Mainland Portugal and Cape Trafalgar (Cabo Trafalgar) at the western end of the Strait of Gibraltar. Two major rivers, the Guadalquivir and the Guadiana, as well as smaller rivers, like the Odiel, the Tinto, and the Guadalete, reach the ocean here.