Lake Rotopounamu (also known as Greenstone Lake, from the Māori roto (lake) and pounamu (greenstone)^[1]) is a secluded lake in the Pihanga Scenic Reserve, in the Tongariro National Park in New Zealand's Central North Island.^[2] It lies at the northwest foot of Mt Pihanga, and was formed by a landslide around 10,000 years ago.^[1] The lake is fed by seven streams, but has no visible surface outflow. It is believed to drain underground.^[1]

Quick Facts Location, Coordinates ...

Lake Rotopounamu
Lake Rotopounamu
Lake Rotopounamu
Location	Tongariro National Park, North Island
Coordinates	39.0267°S 175.7382°E / -39.0267; 175.7382
Type	landslide formation
Primary inflows	seven streams
Primary outflows	Nothing visible but has a gurgler (drain)
Basin countries	New Zealand
Max. length	1,265 m (4,150 ft)
Max. width	1,025 m (3,363 ft)
Surface area	1 km2 (0.39 sq mi)
Max. depth	9 m (30 ft)

Close

Around the lake is a scenic 5-kilometre (3 mi) loop track, which can be accessed from the Pihanga Saddle road (State Highway 47) between Tūrangi and Tongariro. Walking this track takes about two hours.