The Waitahaia River is a river in the Waiapu Valley of the Gisborne Region of New Zealand's North Island. It flows northeast from the southern end of the Raukumara Range to reach the Mata River 20 kilometres (12 mi) west of Te Puia Springs. It is renowned for its brown trout, a European species of fish introduced into New Zealand for fishing in the late 1860s.
"Place Name Detail: Waitahaia River". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 12 July 2009.
Coordinates: 38°01′S 178°04′E / 38.017°S 178.067°E