The headwaters of the river rise in Arnhem Land and flow in an easterly direction and eventually discharges into the Limmen Bight within the Gulf of Carpentaria.

The estuary formed at the river mouth is tidal in nature and in near pristine condition.

[3] The estuary at the river mouth occupies an area of 54.8 hectares (135 acres) of open water.

It is river dominated in nature with a tide dominated delta having single channel and is surrounded by an area of 109.4 hectares (270 acres) covered with mangroves.

[5] The river has a mean annual outflow of 500 gigalitres (654,000,000 cu yd),[6] Ten species of fish are found in the river including; glassfish, Barred Grunter, Fly-specked Hardyhead, Salmon Catfish, Mouth Almighty, Barramundi, Rainbowfish and Bony Bream.