The best way to explore the park is by boat. Whether you are into sailing or motorboats, the outlying islands of Finland's easternmost coastal regions offer exciting adventures far away from the mainland and people. Boats can be moored in excursion harbours on the bigger islands of the park. Jetties and services for boaters are also available on the nearby islands of Tammio, Kaunissaari and Haapasaari. The nearest bigger guest harbours are Kotka and Hamina.

There are also ways to explore the park if you do not own a boat: public cruises to the park depart from Kotka. Additionally, you can reach the park by water taxi or on boat trips organized by partner entrepreneurs.