Lopasnya
| Lopasnya | |
|---|---|
| .jpg) Lopasnya at Chekhov | |
| Native name | Лопасня (Russian) | 
| Location | |
| Country | Russia | 
| Physical characteristics | |
| Mouth | Oka | 
|  • coordinates | 54°50′34″N 37°51′00″E / 54.8427°N 37.8500°E | 
| Length | 108 km (67 mi) | 
| Basin size | 1,090 km2 (420 sq mi) | 
| Basin features | |
| Progression | Oka→ Volga→ Caspian Sea | 
The Lopasnya (Russian: Лопа́сня) is a river in Moscow Oblast in Russia. It is a left tributary of the Oka. It is 108 km in length, with a drainage basin of 1090 km².[1] Its average discharge is 6,76 m³/s.

Wikimedia Commons has media related to Lopasnya River.
References
- ^ «Река ЛОПАСНЯ», Russian State Water Registry