Wairau River in the context of "Buller River"

Ngāti Toa, also called Ngāti Toarangatira or Ngāti Toa Rangatira, is a Māori iwi (tribe) based in the southern North Island and the northern South Island of New Zealand. Ngāti Toa remains a small iwi with a population of about 9,000. The iwi is centred around Porirua, Plimmerton, Kāpiti, Blenheim and Arapaoa Island. It has four marae: Takapūwāhia and Hongoeka in Porirua City, and Whakatū and Wairau in the South Island. Ngāti Toa's governing body has the name Te Rūnanga o Toa Rangatira.

The iwi traces its descent from the eponymous ancestor Toarangatira. Ngāti Toa lived in the Kāwhia region of the North Island until the 1820s, when forced out by conflict with other Tainui iwi, led by Pōtatau Te Wherowhero (c. 1785 – 1860), who later became the first Māori King (r. 1858–1860). Ngāti Toa, Ngāti Rārua and Ngāti Koata, led by Te Rauparaha (c. 1765 – 1849), escaped south and invaded Taranaki and the Wellington regions together with three north Taranaki iwi, Te Āti Awa, Ngāti Tama and Ngāti Mutunga. Together they fought and conquered the people of Wellington, Ngāti Ira, who practically ceased to exist as an independent iwi.After the 1820s, the region conquered by Ngāti Toa extended from Miria-te-kakara at Rangitikei to Wellington, and across Cook Strait to Wairau and Nelson.

Te Rauparaha (c. 1760s – 27 November 1849) was a Māori rangatira, warlord, and chief of the Ngāti Toa iwi. One of the most powerful military leaders of the Musket Wars, Te Rauparaha fought a war of conquest that greatly expanded Ngāti Toa southwards, receiving the epithet "the Napoleon of the South". He remains one of the most prominent and celebrated New Zealand historical figures.

Born probably in the 1760s, Te Rauparaha's conquests eventually extended Ngāti Toa authority from Miria-te-kakara at Rangitikei to Wellington, and across Cook Strait to Wairau and Nelson. He participated in land sale and negotiations with the New Zealand Company at the beginning of the colonisation of New Zealand. An early signatory to the Treaty of Waitangi, Te Rauparaha was later central to the Wairau Affray in the Marlborough district, considered by many to be the first of the conflicts in the New Zealand Wars. Shortly before he died he led the building of Rangiātea Church in Ōtaki.

Spring Creek is a small town in Marlborough, New Zealand. State Highway 1 runs past the settlement to the west, and the Wairau River flows past to the east. Picton is 22 km to the north, and Blenheim is 6 km to the south.

The first European settlers were George Dodson, William Soper, and Dr Vickerman, in 1850. There was a major flood in 1926, when the Wairau River burst its embankments.

Wairau Valley is the valley of the Wairau River in Marlborough, New Zealand and also the name of the main settlement in the upper valley. State Highway 63 runs through the valley. The valley opens onto the Wairau Plain, where Renwick and Blenheim are sited. The Alpine–Wairau Fault runs along the length of the valley.

Wairauite is an iron-cobalt alloy which is named after the valley.