Hart-Miller Island is a 1,100-acre island located in Baltimore County on the Chesapeake Bay near the mouth of Middle River. It is accessible only by personal boat. The western shore of the island offers safe mooring, wading and access to a 3,000-foot sandy beach. Hart-Miller Island State Park also includes Hawk Cove and Pleasure Island, which also provide recreational opportunities and camping.
On May 7, 2016, the south cell of Hart-Miller Island officially opened for public access for the first time since construction began on the dike in 1981.