Geography
See: List of Maryland counties, List of Maryland rivers
Maryland is bounded on the north by Pennsylvania, on the west by West Virginia, on the east by Delaware and the Atlantic Ocean, and on the south, across the Potomac River, by Virginia. It shares a border near the center of the state along the Potomac with Washington, DC. Chesapeake Bay nearly bisects the state, and the counties east of the Bay are known collectively as the Eastern Shore. A portion of extreme western Maryland in Garrett County is drained by the Youghiogheny River as part of the watershed of the Mississippi River. The highest point in Maryland is Backbone Mountain, which is the southwest corner of Garrett County, right near the border with West Virginia near the headwaters of the North Branch of the Potomac.