1.Ostrzyce – Kiełpinko (Trątkownica): 14 km (transport of kayaks from Trątkownica to Rutki)
2.EW Rutki – Kolbudy: 18 km (transport of kayaks from Kolbudy to Straszyn)
3.EW Straszyn – Gdańsk: 25 km (including 6 km through Motława)
1. Jar Rzeki Raduni – A canyon section of the Radunia River. Over a circa 10 km long section between Trątkownica and Rutki, the river goes through a deep gorge. It can be covered by foot across a marked tourist trail alongside the river.
2. Historical water power plants on lower Radunia – Lower Radunia has been developed with a number of water power plants. These are consecutively: Rutki, Łapino, Bielkowo, Straszyn, Prędzieszyn, Kuźnice, Juszkowo, and Pruszcz, as well as Pruszcz II.
3. Faktoria in Pruszcz Gdański – It is the location of a reconstructed Trade Factory from Roman times, erected at the location of old archaeological discoveries from the “amber road” period.
4. Pruszcz Gdański – A dynamically developing city near Gdańsk. The center includes a gothic church, while a great complex of a currently not-operational sugar plant is located by the shore of Radunia.
5. Radunia Canal – It is one of the most interesting hydrotechnical constructions in Poland. It has been erected in the 14th century by the Teutonic Order and is circa 14 km long. It was remarkably significant as a source of drinking water for the city’s residents and castle staff, and the water flowing in it constituted a motor for the mills, forges, and sawmills of Gdańsk.
Radunia is a beautiful river connecting Szwajcaria Kaszubska with Gdańsk. Its upper lake section (above Ostrzyce) has been described in the guide as a separate trail – “Kółko Jezior Raduńskich”.
Most kayakers associate Radunia with extreme experiences, emotions, and adrenaline which are provided by its central canyon character. However, since 2013 this part of the trail is unavailable for kayakers due to protecting nature in the Jar Rzeki Raduni reserve.
The second characteristic feature of Radunia is a large number of water power plants in its lower stream. For that reason it is sometimes referred to as a “busy river”. These power plants constitute an additional attraction when kayaking but at the same time an obstacle due to multiple portages. The section between Kolbudy and Rutki is not included in the water trails precisely because of the water power plants, as well as a prohibition to enter the water reservoir of the Straszyn power plant which constitutes the main water supply for Gdańsk.
From Ostrzyce to Gdańsk, Radunia is available on three kayaking sections. The first one between the Ostrzyckie Lake and the marina in Trątkownica is remarkably picturesque. Here the river meanders among hills and fields, through typical Kashubian landscapes. After a portage, the second stage can be initiated below the power plant in Rutki. The trail includes: Żukowo – famous for its Premonstratensian gothic monastery (currently Saint Mary’s Church) and the first power plant of Radunia in Łapin. In Kolbudy it is necessary to carry out a second portage to the Straszyn power plant. There the lower section of the trail begins and leads through following power plants and then Faktoria in Pruszcz Gdański. From this point it is close to Radunia’s mouth to Motława with which it is possible to reach the center of Gdańsk.