The Abzucht, also known in its upper reaches as the Wintertalbach, is a 12.1-kilometre (7.5 mi) long, orographically left-hand, tributary of the Oker in Lower Saxony, Germany.

The Abzucht rises in the upper Winter valley (Wintertal) as the Wintertalbach at an elevation of 722 metres (2,369 ft) NN.

Below this pond the canalised stream passes through the area of the Rammelsberg Mine and reaches the southern edge of the town of Goslar.

After running through the Old Town (Altstadt) of Goslar it continues on, accompanied by the B 498 federal road to Goslar-Oker where it discharges into the Oker from the left at an elevation of 192 m above NN.

The stream drains a catchment area of 31.61 square kilometres (12.20 sq mi) before its waters pass down the Oker, Aller and Weser to the North Sea.