The Pelska (also known as the Belka) is a river in southeastern Estonia, although its headwaters are in Russian territory.

On Estonian territory, the river flows through the village of Seto, and it is also called the Pelska.

Basin information is provided by the Land Improvement Offices put together in 2008 and 2009, or, in the absence of it, information about the area of basins calculated from the 1990s drainage area map is used.

[2] Mustoja and Helbi creeks flow into the Pelska; the river itself discharges into the Piusa.

The European bullhead (Cottus cobio) is well known among the species of fish in the river.