The Aire River is a perennial river of the Corangamite catchment, located in the Otways region of the Australian state of Victoria. The Aire River rises below the Otway Ranges in a remote forestry area southeast of the locality of Beech Forest. The river generally flows west by south then south through the Great Otway National Park, joined by three minor tributar…The Aire River is a perennial river of the Corangamite catchment, located in the Otways region of the Australian state of Victoria. The Aire River rises below the Otway Ranges in a remote forestry area southeast of the locality of Beech Forest. The river generally flows west by south then south through the Great Otway National Park, joined by three minor tributaries, before reaching its mouth and emptying into Bass Strait west of Cape Otway. The river descends 555 metres over its 40 kilometres course; including a 49 metres descent over the Hopetoun Falls in its upper reaches, located at an elevation of 314 metres above sea level.