Roper River
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The Roper River (named after John Roper) is one of the largest rivers in the Northern Territory, Australia, extending east for over 500 km to meet the sea in Limmen Bight on the Gulf of Carpentaria. It is navigable for about 145 km, until the tidal limit at Roper Bar, and forms the southern boundary of the region known as Arnhem Land. Mataranka Hot Springs and the township of Mataranka lie close to the river at its western end. Port Roper lies near its mouth on Limmen Bight.