It is located one mile (1.6 km) west of the southwestern corner of Orcas Island and accessible only by boat.

The island was named by the Wilkes Expedition in 1841 for naval officer Jacob Jones.

The park's population of black-tail deer have become accustomed to human presence and will allow themselves to be fed by hand; however, this activity is illegal.

On the south side there are some secure anchorage points, although knowledge of tides, currents and bottom depth should be taken into account.

Kayakers should also be aware of the dramatic tidal exchanges, weather conditions and possibility of the campsite to be booked out by tours.