| Blue Lake / Warwar | |
|---|---|
.jpg) Panorama of the Blue Lake in late December | |
  Blue Lake / Warwar Location in South Australia | |
| Location | Mount Gambier, South Australia |
| Coordinates | 37°50′48″S 140°46′41″E / 37.84667°S 140.77806°E |
| Type | Monomictic crater lake |
| Basin countries | Australia |
| Max. length | 1,087 m (3,566 ft) |
| Max. width | 657 m (2,156 ft) |
| Surface area | 60 ha (150 acres) |
| Average depth | 72 m (236 ft) |
| Max. depth | 77 m (253 ft) |
| Residence time | 3.45 years |
| Surface elevation | Approx. 20 m (66 ft) |
| Islands | None |
| Settlements | None |
Blue Lake / Warwar (The Blue Lake) is a large, monomictic, crater lake located in a dormant volcanic maar associated with the Mount Gambier maar complex. The lake is situated near Mount Gambier in the Limestone Coast region of South Australia, and is one of four volcanic crater lakes originally on Mount Gambier maar. Of the four lakes, only two remain, the other one being Valley Lake / Ketla Malpi; the other two, Leg of Mutton Lake / Yatton Loo and Brownes Lake / Kroweratwari, dried up as the water table dropped.