Upon arrival, rangers offer an additional lecture to all visitors. The island can only be accessed from Puerto Rico. From the west coast towns of Mayaguez and Cabo Rojo, chartered boats are available for the six hour trip. Because of the distance and the wide range of activities available, it is recommended to make plans for at least a few days. The waters are rough in the Mona Passage, especially during the months of November to March.
Fishermen offering the sea transportation schedule their trip at night when the ocean is calm.
Small planes used to land on a small grass field in the South coast of Mona. The airfield is now closed and will be reopened to the public in a near future. Upon calling the DNR, they will mail a brochure and the application form. Choosing a tour operator may be a better option since they provide experienced and knowledgeable guides along with meals, drinking water, camping gears, snorkeling equipment and the sea transportation. They also offer meals, snorkeling and camping gears.