Stroupínský potok, Natural monument in Hředle, Czech Republic

Stroupínský potok is a natural monument protecting the lower course of a stream between Bavoryně, Hředle and Zdice in the Beroun district, declared in 2017. The stream flows through gently rolling farmland at 265–285 m, with a stony to boulder-strewn bed 0.2–1 m deep, alternating riffles and calm pools, and a narrow bank strip of willows, poplars and alders.

The site received official protection status in 2017 when the Czech Republic designated it as a natural monument to preserve its ecological features. This designation reflects the area's importance to the region's natural heritage.

The stream has long supplied water to the villages of Hředle, Bavoryně and Zdice for household and farm use and is registered as a water-supply stream. Nine concrete and wooden steps built during regulation of the channel act as migration barriers against invasive species moving upstream.

The monument covers the lower course of the stream between Hředle and Zdice, at 265–285 m elevation, with a stony to boulder-strewn bed and pools 0.2–1 m deep. Nine concrete and wooden steps built during stream regulation act as migration barriers. The water is a registered drinking-water source, so keep to the banks and do not wade or disturb the stones where crayfish hide.

The stream's lower course drops only gently and barely meanders, holding pools 0.2–1 m deep beside riffles; this depth variety gives the critically endangered stone crayfish (about 0.4 individuals per m²) and noble crayfish (about 0.5 per m²) their hiding stones. Nine concrete and wooden steps built during channel regulation act as migration barriers against invasive species moving upstream.