Section length: 14 km
The stretch of the Zbrzyca River between the mouth of the Młosina and the Lake Księże is easy. On the route, there are portages (Kaszuba, Milachowo – Młyn), which can make this section slightly onerous. The route passes along gentle hillsides of the widening valley with clearings, meadows, pastures and farmland, always bounded on the horizon by a wall of forest. From the village of Rolbik, the river meanders down to Lake Milachowo. Further on, to Lake Księże, the river flows just by a beautiful forest.