The river then flows past Leimen into the Schwarzbach valley. It takes up the and the from the right and the from the left, before reaching the Clausensee reservoir. Then it flows to Waldfischbach-Burgalben where it takes up the Moosalb from the right. At the hamlet of , it takes up the Rodalb from the left, then flows to Thaleischweiler-Fröschen. Below this twin village, it takes up the from the right. It then flows past Rieschweiler-Mühlbach to Dellfeld, where the Schwarzbach valley ends and the river flows into the Blies valley. It flows past Contwig to Zweibrücken, where it takes up the from the right, followed by the Horn from the left.