The upper reaches rise into the Arnhem Land escarpment and Kakadu, to the northeast. The Victoria River (The Northern Territory's largest river system) is situated 189 km south-west of Katherine along the Victoria Highway. Katherine is at the crossroads of the Outback due to its location between the Darwin region, Kakadu National Park, the Barkley Region, the Gulf of Carpentaria and the Kimberley region of Western Australia.