Hart-Miller Island State Park is dog-friendly. You can bring Fido with you to enjoy the 1,100-acre island on Chesapeake Bay near the mouth of Middle River. Moor your boat on the west side of the island, where you'll discover a 3,000-foot sandy beach. This is the perfect spot for people who are looking to get away from it all to a tranquil, luscious island that can only be accessed by boat. Ornithologists will discover plenty of birds that call the island home. Dogs are welcome on leash under six feet, as long as owners clean up any mess that they leave behind. Hart-Miller Island State Park is open every day of the week from 8am until sunset.