|Location||Mackenzie Basin, Waitaki District, Canterbury region, South Island|
|Primary inflows||Hopkins, Dobson|
|Catchment area||1,198 km2 (463 sq mi)|
|Basin countries||New Zealand|
|Surface area||54 km2 (21 sq mi)|
|Average depth||74 m (243 ft)|
|Max. depth||129 m (423 ft)|
|Water volume||4.02 km3 (3,260,000 acre·ft)|
|Surface elevation||520 m (1,710 ft)|
Lake Ohau is a glacial lake in the Mackenzie Basin of New Zealand's South Island. It is fed by the Hopkins and Dobson rivers, which have their headwaters in the Southern Alps, and has its outflow in the Ohau River, which itself feeds into the Waitaki River hydroelectric project.
The Ohau ski field is located close to the southwestern shore of the lake.
The lake forms part of the traditional boundary between 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 Ohau is on the route of the Alps to Ocean Cycle Trail, which has been constructed in the years after approval in 2010. The trail runs along the Lake up to Lake Ohau Lodge, and then climbs up the Tarnbrae Track before a flowing descent to Quailburn Road.
- Irwin, J. (September 1978), "Bottom sediments of Lake Tekapo compared with adjacent Lakes Pukaki and Ohau, South Island, New Zealand" (PDF), N.Z. Journal of Marine and Freshwater Research, 12 (3), pp. 245–250, doi:10.1080/00288330.1978.9515749, retrieved 2007-11-09
- "Place Name Detail: Lake Ohau". New Zealand Geographic Placenames Database. Land Information New Zealand. Retrieved 1 July 2008.
- Waitaki District Council ward area, Waitaki District Council website, retrieved 1 July 2008.
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