From here, the Innerste flows through the Harzvorland, a hilly countryside. Further tributaries are river Nette ( in length), river Lamme ( in length), river Bruchgraben, river Neile and river Beuster ( in length).
Following its course, the Innerste river traverses the Harzvorland, a mountainous area.  It is joined by several smaller rivers: the Nette, the Lamme, the Bruchgraben, the Neile, and the Beuster.