Lake Ōhau
Lake Ōhau
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Lake Ōhau

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Lake Ōhau

Lake Ōhau is a lake in the Mackenzie Basin in the South Island of New Zealand. The Hopkins and Dobson rivers fed into the northern end of Lake Ōhau. These rivers have their headwaters in the Southern Alps. The lake's outflow is the Ōhau River, which travels from the southeast corner of Lake Ōhau and feeds into the Waitaki River hydroelectric project. The Barrier range (and Mount Sutton 2007m in particular) dominate the western side of Lake Ōhau, while the Ben Ohau range dominates the eastern side of Lake Ōhau. At the northern end of the lake, in between the Hopkins and Dobson rivers, lies the Naumann Range of mountains (with Mount Glenmary 2590m being the tallest).

The New Zealand Ministry for Culture and Heritage gives a translation of "place of Hau" for Ōhau, but an alternative meaning could be "windy place".

Ōhau is the smallest of three roughly parallel lakes running north–south along the northern edge of the Mackenzie Basin (the others are Lake Pukaki and Lake Tekapo). It covers 60 km2.

Lake Ohau Alpine Village is located on the western shore of the Lake.

The lake forms part of the traditional boundary between the Otago and Canterbury regions, Otago's northernmost point being the headwaters of the Hopkins River. Officially the lake lies in the northwestern part of the Waitaki District within the southern part of the Canterbury region.

Lake Ōhau is 320 kilometres (four hours drive) west of Christchurch and 275 kilometres (three hours drive) north of Dunedin. It is accessed by turning off State Highway 8 between Twizel and Omarama on to Lake Ōhau Road which arrives at Lake Ōhau after about 17 kilometres.

The warmest month of the year is February, with an average temperature of 15.4 °C | 59.7 °F. The lowest average temperatures in the year occur in July, when it is around 2.8 °C | 37.0 °F. Monthly rainfall ranges between an average of 57mm in February to 101mm in October. Snow is common in the winter months of June, July and August.

The legends of Ngāi Tahu speak of Lake Ōhau being one of the lakes dug by the Waitaha explorer Rākaihautū with his Polynesian digging stick which was called [Tūwhakaroria. After arriving in the Uruao waka at Nelson, Rākaihautū divided his people into two groups. Rākaihautū led his group down the middle of the island, digging the South Island freshwater lakes. His son, Rakihouia, led the other group down the east coast of the South Island.

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