|Location||Mackenzie, Waimate, and Waitaki Districts, Canterbury region, South Island|
|Primary inflows||Ohau, Pukaki, Tekapo, Ahuriri|
|Basin countries||New Zealand|
|Surface area||75 km2 (29 sq mi)|
|Max. depth||90 m (300 ft)|
|Surface elevation||362 m (1,188 ft)|
The lake has an area of about 75 km² and a maximum depth of 90 meters. The lake consists of two arms: the Haldon arm, fed mainly by the Tekapo, Pukaki and Twizel rivers, and the Ohau Canal; and the Ahuriri Arm, fed mainly by the Ahuriri River. Immediately downstream is Lake Aviemore.
The lake is the reservoir of Benmore Dam, New Zealand's largest earth dam, which was created as part of the Waitaki hydroelectricity power scheme. Construction of Benmore Dam was approved in 1957 and the lake was filled in December 1964.
Besides being a reservoir for Benmore Dam, the lake is a fishing spot; in 2009 it was the second most-fished lake in New Zealand, with fish such as brown trout, rainbow trout, chinook salmon, and sockeye salmon. Fish in the lake include salmon that have escaped from salmon farms on nearby hydro canals. The lake is also used for swimming and camping and there are walks in the area.
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- "Lake Benmore Water Quality". Land, Air, Water Aotearoa (LAWA). Retrieved 9 February 2020.
- "Power for the People". RNZ. 11 May 2015. Retrieved 9 February 2020.
- "Benmore dam hydro station". Meridian Energy. Retrieved 9 February 2020.
- Adams, R (1974). "Statistical studies of earthquakes associated with Lake Benmore, New Zealand". Engineering Geology. 8 (1–2): 155–169. doi:10.1016/0013-7952(74)90022-2. ISSN 0013-7952.
- Bruce, David (19 January 2009). "Hooked on fishing at Lake Benmore". Otago Daily Times Online News. Retrieved 9 February 2020.