Bolshoye Ostrovnoye
| Bolshoye Ostrovnoye | |
|---|---|
| Большое Островное | |
Sentinel-2 image of the lake in May | |
| Location | Ob Plateau West Siberian Plain |
| Coordinates | 52°43′32″N 81°42′17″E / 52.72556°N 81.70472°E |
| Primary outflows | Kasmala |
| Catchment area | 892 square kilometers (344 sq mi) |
| Basin countries | Russia |
| Max. length | 16.6 kilometers (10.3 mi) |
| Max. width | 4.1 kilometers (2.5 mi) |
| Surface area | 28.6 square kilometers (11.0 sq mi) |
| Average depth | 1.8 meters (5 ft 11 in) |
| Max. depth | 5.6 meters (18 ft) |
| Residence time | UTC+6 |
| Surface elevation | 206 meters (676 ft) |
| Islands | Berezovy Island |
| Settlements | Mamontovo |
Bolshoye Ostrovnoye (Russian: Большое Островное) is a salt lake in Mamontovsky District, Altai Krai, Russian Federation.
The lake lies roughly in the middle of the Krai. Mamontovo, Ostrovnoye and Malye Butyrki are located close to the lakeshore. The nearest towns are Bukanskoye, near the northern end, and Kazantsevo 11 kilometers (6.8 mi) to the southwest.