Lake Otamangakau
| Lake Otamangakau | |
|---|---|
| Location | Ruapehu District, North Island |
| Coordinates | 39°00′04″S 175°37′16″E / 39.001°S 175.621°E |
| Basin countries | New Zealand |
| Max. length | 3.1 km (1.9 mi) |
| Max. width | 900 m (3,000 ft) |
| Surface area | 1.8 km2 (0.69 sq mi) |
| Max. depth | 12 m (39 ft) |
Lake Otamangakau is a small artificial lake located within Tongariro National Park in the Ruapehu District.