| Tsna River (Mstino Lake basin) | |
|---|---|
| Origin | Valdai Hills |
| Mouth | Mstino Lake |
| Basin countries | Russia |
| Length | 160 km |
| Avg. discharge | 12 m³/s |
| Basin area | 4,390 km² |
Tsna (Russian: Цна) is a river in Tver Oblast, Russia. It belongs to Baltic Sea (Neva River) basin. Its source is situated in the Valdai Hills close to the drainage divide between Neva and Volga (Caspian Sea) basins, thus the river was once an important trade route. The town of Vyshny Volochyok is situated upon Tsna.