| Pyasina | |
| Subdivision Type1: | Country |
| Subdivision Name1: | Russia |
| Subdivision Type3: | Region |
| Subdivision Name3: | Krasnoyarsk Krai |
| Subdivision Type5: | City |
| Subdivision Name5: | Ust-Tareya |
| Length: | 818km (508miles) |
| Discharge1 Avg: | 2550m3/s |
| Source1: | Lake Pyasino |
| Source1 Coordinates: | 70.0645°N 88.0643°W |
| Source1 Elevation: | 28m (92feet) |
| Mouth: | Kara Sea, Arctic Ocean |
| Mouth Location: | Pyasina Bay |
| Mouth Coordinates: | 73.9°N 87.0472°W |
| Basin Size: | 182000km2 |
| Tributaries Left: | Agapa, Mokoritto, Pura |
| Tributaries Right: | Chernaya, Dudypta, Yangoda, Tareya, Binyuda |
The Pyasina (Russian: Пясина) is a river in Krasnoyarsk Krai, Russia. The river is 818km (508miles) long, and its basin covers 182000km2. The Pyasina River originates in Lake Pyasino and flows into the Pyasino Gulf of the Kara Sea. There are more than 60,000 lakes in the basin of the Pyasina covering a total area of . The river freezes up in late September or early October and stays under the ice until June. It is connected to the river Chetyrekh through its right distributary Staritsa.
The Dvina merchant Kondratiy Kurochkin reached the mouth of the Pyasina in 1610.[1] In 1614, an ostrog was built on the river to collect yasak from the natives.[1] In 1935, before the Dudinka-Norilsk railway had been built, the river Pyasina and Lake Pyasino were used to deliver cargo to the site of the future city of Norilsk.[2]
The calving grounds of the Taimyr reindeer herd, a migrating tundra reindeer (R.t. sibiricus), the largest reindeer herd in the world,[3] [4] is along the right bank of the Pyasina and at the bend of the middle flow of the Agapa.