The Winter brook (Dutch: Winterbeek) is the mainstream in a network of partially excavated stream beds in Belgium in the Southern Campine region.

The Winter brook originates in Beverlo (a district of Beringen), and, after a course of 32 km, it flows into the Demer River in Scherpenheuvel-Zichem.

The Winter brook flows through the natural area Vallei van de Drie Beken south of the village Deurne.

Between the villages of Beverlo and Beringen Mine, the brook flows westward, guided through a siphon under the Albert Canal.

This name is given to the dark color that the water acquires due to the presence of peat soil.

In the western part of the watershed, the valley is flanked by escarpments composed of iron sandstone.

The discharge into the Big ditch and Winter brook had turned those streams into brackish water rivers.

[6] Historical contamination with heavy metals such as arsenic, barium, cadmium, and radium was also found in the water bottom and banks.

Consequently, people declared the stream "biologically dead": "Neither fauna nor flora is found in the watercourse."

[8] In March 2017, Tessenderlo Chemie, OVAM, and the Flemish Environmental Society (Dutch: Vlaamse Milieumaatschappij) (VMM) started the remediation work; the aim was to have it completed by 2021.