Lake Gunn is a lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 in the South Island

South Island

The South Island is the larger of the two major islands of New Zealand, the other being the more populous North Island. It is bordered to the north by Cook Strait, to the west by the Tasman Sea, to the south and east by the Pacific Ocean...

 of New Zealand

New Zealand

New Zealand is an island country in the south-western Pacific Ocean comprising two main landmasses and numerous smaller islands. The country is situated some east of Australia across the Tasman Sea, and roughly south of the Pacific island nations of New Caledonia, Fiji, and Tonga...

, located at 44°53′S 168°05′E.

A small lake between Lake Te Anau

Lake Te Anau

Lake Te Anau is in the southwestern corner of the South Island of New Zealand. Its name was originally Te Ana-au, Maori for 'The cave of swirling water'. The lake covers an area of 344 km², making it the second-largest lake by surface area in New Zealand and the largest in the South Island...

 and Milford Sound

Milford Sound

Milford Sound is a fjord in the south west of New Zealand's South Island, within Fiordland National Park, Piopiotahi Marine Reserve, and the Te Wahipounamu World Heritage site...

, it lies close to the State Highway 94

New Zealand State Highway network

The New Zealand State Highway network is the major national highway network in New Zealand. Just under 100 roads in both the North and South Islands are State Highways...

 (the Milford Sound Road). The small tramping camp of Cascade Creek lies close to the lake's southern end. The west branch of the Eglinton River

Eglinton River

The Eglinton River is located in the region of Southland in the southwest of New Zealand. It flows through Fiordland National Park for 50 kilometres...

 flows through the lake.

The lake is within the boundary of the Fiordland National Park

Fiordland National Park

Fiordland National Park occupies the southwest corner of the South Island of New Zealand. It is the largest of the 14 national parks in New Zealand, with an area of 12,500 km², and a major part of the Te Wahipounamu World Heritage site...

, and is surrounded by native bush. Several smaller lakes lie nearby, including Lake Fergus

Lake Fergus

Lake Fergus is a lake in the South Island of New Zealand, located at .A small lake between Lake Te Anau and Milford Sound, it lies adjacent to the State Highway 94 . The lake is within the boundary of the Fiordland National Park, and is surrounded by native bush...

 and Lake McKellar. Several mountains stand close to the lake's western shore, notably Melita Peak (1680 m) and Consolation Peak (1760 m). "The Divide", the saddle between the valleys of the Eglinton and Hollyford River

Hollyford River

The Hollyford River is located in the southwest of the South Island of New Zealand. It runs for eighty miles in Fiordland, its source being ten kilometres to the north of the northern tip of Lake Te Anau and close to the Homer Tunnel....

s, lies four kilometres north of the lake.

The lake was named after George Gunn, a runholder, who discovered the lake in 1861.