Regretfully, until further notice that part of hassel island owned by the VI National Park Service is closed to visitors. The hurricanes of September 2017 caused extensive damage to the trails, and absence of any maintenance by the park service since then has resulted in extensive plant growth, making many areas inaccessible.
That part of Hassel Island owned by the Virgin Islands government, currently being maintained by the St Thomas Historical Trust, is open to self-guided tours. please visit The Hassel Island Tours page on the St. Thomas Historical Trust site for instructions on how to make an appointment.