Te Rau-o-te-Huia / Mount Donald McLean is a hill in the Waitākere Ranges of the Auckland Region of New Zealand's North Island.

[2] Te Rau-o-te-Huia / Mount Donald McLean is a part of the Waitākere volcano, which first began erupting 23 million years ago, during the Miocene era.

The hill is also a habitat for the rare Waitākere rock koromiko Veronica bishopiana and Hall's tōtara, Podocarpus laetus.

[10][11] In English, the hill was named after Donald McLean, a government administrator and major figure in Māori-Pākehā relations in the mid-19th Century.

[12][13] During the 1850s, the Gibbons family milled the kauri forest on the north side of Te Rau-o-te-Huia / Mount Donald McLean.