The Słupia flows down at an altitude of about 178 m above sea level from peat bogs near Siera-owska Huta in the Kashubian Lake District, and ends its course, flowing into the Baltic Sea in Ustka. This interesting kayaking trail has a great advantage: the 62-kilometer section from Sulęczyno to Gałęźnia Mała is listed in the GOK-PTTK regulations as a mountain kayaking trail. Another attraction are the hydrotechnical historic structures of several power plants from the years 898-1926 and the adits, canals, earth dams and siphons associated with them. This makes it necessary to carry or even transport the kayaks sometimes over considerable distances. However, these inconveniences are compensated by the possibility of viewing the mergetic system, unique in Europe.

In its upper reaches, the Słupia flows through numerous lakes. In the middle reaches, as a result of water damming, the Konradowo and Krzynia flood reservoirs were created. The river changes its course several times, making wide arcs. The width and depth of the riverbed also change. In its lower reaches, the bottom is rocky, with boulders, rapids, and shallows. In short sections, the river has a gorge character. Particularly interesting are the sections within the Bytowskie Lake District and the 'olanowska Upland between the Zukowskie and Głębokie lakes, where the Słupia is a wild, forest river. The more interesting ones include the section with the long and winding Konradowo reservoir and the Słupsk Plain, where the river undercuts the western edges of the Damnicka Upland. Below Słupsk, a range of hills called the Włynkowskie Mountains appears.

A significant part of the rafting route leads through the protected forest areas of the Słupia Valley Landscape Park. This largest of the 9 landscape parks in the Pomeranian province was established in 1981. Together with the buffer zone, it covers 83,170 ha. It covers the area of the middle course of the river and its catchment area from Oszyca to the Krępa-Łosino road. It is a valley-type park. Forests, most often pine forests, cover 72%. Peat bogs are among the most interesting plant formations, and among them, particularly valuable raised bogs. An important element of the landscape are lobelia lakes overgrown with relict plants. The number of vascular plants in the park amounts to 748 species, and many of them are protected, valuable, rare and endangered species. Of note is the nesting of goldeneye, hen harrier, red kite, white-tailed eagle, lesser spotted eagle and eagle owl - birds that are endangered and entered in the "Polish Red Data Book of Animals". Due to the diversity and richness of avifauna, the park area has been recognized as one of 118 bird sanctuaries in Poland.

When sailing along this lively, dynamic and landscape-changing artery, it is important to remember that camping is only allowed in the park in six marinas prepared especially for kayakers. These places can be an excellent base for visiting interesting and attractive technical monuments - hydroelectric power plants or natural curiosities. The park management also asks that the number of kayaking trips be limited in June and early July due to the breeding season of rare bird species.