2020 Map of Dog Keys Pass

About this map

Gulf Islands National Seashore encompasses this section of the barrier islands, where the waters of the Mississippi Sound meet the open Gulf of Mexico. The map documents the shifting topography of the barrier chain, notably the eastern tip of Ship Island at East Point and the western reach of Horn Island at West Point. These islands are separated by the tidal inlets of Little Dog Keys Pass and the larger Dog Keys Pass. The boundary between Harrison and Jackson counties runs vertically through the pass, marking a political division in the middle of these coastal waters. This survey provides a precise record of the shoreline and shoals as they existed in the early 21st century, illustrating the gap between the major barrier islands and the navigable channels used for coastal transit.