Located about 90 km east of Darwin, the Mary River area encompasses the popular
Mary River National Park (proposed) on the Arnhem Highway between Darwin and the
famed Kakadu National Park and includes the Adelaide River.
The Mary River is one of eight rivers in the Top End that have large
floodplains in their catchments, with the Arnhem Highway crossing five of these
eight rivers as you travel between Darwin and Jabiru.
The Mary River catchment covers an area of some 8,100 square km, with
predominately freshwater wetlands that extend over 1,300 square km. The
floodplains is a variable environment, part of a network of northern coastal
wetlands that link eight major rivers.