The hill is a 474-metre peak in the central Waitākere Ranges.[1] It is accessible by the Twin Peaks Track, a tramping track linking Huia and the Huia Ridge Track. The northern side of Te Toiokawharu is the source of the Georges Stream, which flows into the Lower Huia Dam,[2] while the southern side is the source for the Karamatura Stream.[3] Both waterways flow into the Manukau Harbour near Huia. Geologically, Te Toiokawharu and the upper Huia and Karamatura stream valleys are formed of Miocene-era breccia rock formation.[4]
Te Toiokawharu, along with the entire Waitākere Ranges area, is within the traditional rohe of the Te Kawerau ā Makiiwi.[10] The hill, alongside an adjacent peak, were known to Te Kawerau ā Maki people as Ngā Puketūrua, or the hills of burrows.[11] The hill was recognised as the highest point of the Waitākere Ranges in the early 1940s, when city waterworks engineer AD Mead located and measured the height of Te Toiokawharu.[12] The hill had not previously been surveyed, due to its isolation and unsuitability for a trig station location.[13] The name Te Toiokawharu, "The Peak of Kawharu", references the giant Waikato Tainui warrior Kāwharu, who together with Ngāti Whātua attacked the Waitākere Ranges settlements in the late 17th century.[14] The peak was the location of a hollow tree, where hunters would wait to ensnare kererū.[14]
The name was chosen by Wiremu Paora and Rangitutahi of Ngāti Whātua in the 1941, descendants of Kāwharu who were consulted by the New Zealand Geographical Board.[13] The hill's traditional name, Puketūrua, was not known by the board at this point.[13]
^Paterson, Malcolm (2009). "Ko Ngā Kurī Purepure o Tāmaki, e Kore e Ngari i te Pō". In Macdonald, Finlay; Kerr, Ruth (eds.). West: The History of Waitakere. Random House. p. 51. ISBN9781869790080.