The Chesapeake Bay region is America’s largest tidal estuary, bordered by Maryland and Virginia. The bay watershed extends north to Cooperstown, New York, and west to West Virginia, but the Chesapeake region is restricted to the Tidewater on the west and the Delmarva Peninsula (or the Eastern Shore) to the east. The bay is two hundred miles long, with a combined shoreline, indented by numerous rivers and creeks, of about four thousand miles. The major cities in this region are Norfolk, Virginia; Washington, D.C.; and Baltimore, Maryland.