Lake Brunner is the largest lake in the northwestern South Island of New Zealand, covering an area of 40 km². The lake's outflow is the Arnold River, a tributary of the Grey River. The lake lies 31 kilometres to the southeast of Greymouth. The main settlement close to the lake is Moana, on the northern shore. Located several kilometres inland from the coast road (State Highway 6), it is less frequently visited by tourists than many of the West Coast's scenic highlights, but it is becoming increasingly popular, in part due to its reputation for fishing.

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