Poronay
| Poronay 幌内 | |
|---|---|
| Map of the Poronay watershed | |
| Location of the mouth of the Poronay within Sakhalin Oblast | |
| Etymology | Ainu for "big river" | 
| Native name | Поронай (Russian) | 
| Location | |
| Country | Russia | 
| State | Sakhalin Oblast | 
| Physical characteristics | |
| Source | Mount Nevel | 
| • location | East Sakhalin Mountains | 
| • coordinates | 50°22′19.30″N 143°10′56.33″E / 50.3720278°N 143.1823139°E | 
| Mouth | Gulf of Patience | 
|  • location | Sea of Okhotsk | 
|  • coordinates | 49°13′31.77″N 143°07′23.44″E / 49.2254917°N 143.1231778°E | 
| Length | 350 km (220 mi) | 
| Basin size | 7,990 km2 (3,080 sq mi) | 
| Discharge | |
| • location | Pacific Ocean | 
| • average | 120 m3/s (4,200 cu ft/s) | 
The Poronay (Russian: Поронай, Japanese: 幌内川) is the longest river on the island of Sakhalin in Russia. It flows in a southerly direction through Tym, Smirnykhovsky and Poronaysky Districts.