The Mangatewai River is a river of the Manawatu-Wanganui Region of New Zealand's North Island. It flows generally east from the Ruahine Range to reach the Tukipo River (itself a tributary of the Tukituki River) 5km north of the township of Takapau.The Mangatewai River should not be confused with its southern neighbour, the Mangatewainui River.
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