The Ada River is a perennial river of the West Gippsland catchment, located in the West Gippsland region of the Australian state of Victoria. Ada River rises below Marney Hill, northeast of Powelltown, in a state forestry area, and flows generally northeast, then south by east, before reaching its confluence with the Latrobe River, north of the Yarra Jun…The Ada River is a perennial river of the West Gippsland catchment, located in the West Gippsland region of the Australian state of Victoria. Ada River rises below Marney Hill, northeast of Powelltown, in a state forestry area, and flows generally northeast, then south by east, before reaching its confluence with the Latrobe River, north of the Yarra Junction-Noojee Road, west of the locality of Noojee in the Shire of Baw Baw. The river descends 546 metres over its 14-kilometre course.