| Lake Sidihoni | |
|---|---|
| Danau Sidihoni (Indonesian) Tao Sidihoni (Batak) | |
  Lake Sidihoni | |
| Location | Samosir Island, Lake Toba, North Sumatra |
| Coordinates | 2°36′05.34″N 98°44′41.15″E / 2.6014833°N 98.7447639°E |
| Basin countries | Indonesia |
| Surface elevation | 1,295 m (4,249 ft) |
Lake Sidihoni is a lake located within Samosir Island which itself is an island within Lake Toba, in North Sumatra, Indonesia and is therefore notable for being a "lake on an island in a lake on an island". It is approximately 11–12 km to the east of hot spring pools at Pangururan.[1]