The Tangarakau River is a river of the Taranaki and Manawatu-Wanganui Regions of New Zealand's North Island. It flows south from its sources to the northeast of Whangamomona in the King Country to reach the Whanganui River. State Highway 43, known as the Forgotten World Highway, travels through the Tangarakau Gorge.
"Place Name Detail: Tangarakau River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
Coordinates: 39°14′S 174°53′E / 39.233°S 174.883°E