The Challenge Kołobrzeg-Bornholm is a 18 km solo or relay challenge between Hel and Gdynia in the Gulf of Gdańsk in the southeastern part of the Baltic Sea in 17-18°C water temperatures. It is part of the Extreme Baltic Challenge in Poland organized by Sebastian Karaś and Maciej Stachowicz.
Extreme Baltic Challenge Events
- 8 km Challenge Tolkmicko-Krynica Morska
- 12 km Challenge Rewa-Jastarnia
- 18 km Challenge Gdynia-Hel
- 100 km Challenge Kołobrzeg-Bornholm