Martinsburg is a city in and the county seat of Berkeley County, West Virginia, United States, in the tip of the state's Eastern Panhandle region in the lower Shenandoah Valley. Its population was 17,454 in the 2019 census estimate, making it the largest city in the Eastern Panhandle and the eighth-largest municipality in the state. Martinsburg is part of the Hagerstown-Martinsburg, MD-WV Metropolitan Statistical Area.
Jefferson County is located in the Shenandoah Valley in the Eastern Panhandle of West Virginia, and is the easternmost county of the U.S. state of West Virginia. As of the 2010 census the population was 53,498. Its county seat is Charles Town. The county was founded in 1801, and today is part of the Washington metropolitan area.
Outdoor recreation is one of the most popular reasons people love to come to Hagerstown-Washington County, MD.
Frederick is a city in, and the county seat, of Frederick County, Maryland. It is part of the Baltimore–Washington Metropolitan Area. Frederick has long been an important crossroads, located at the intersection of a major north–south Native American trail and east–west routes to the Chesapeake Bay, both at Baltimore and what became Washington, D.C. and across the Appalachian mountains to the Ohio River watershed. It is a part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area, which is part of a greater Washington-Baltimore-Arlington, DC-MD-VA-WV-PA Combined Statistical Area. The city's population was 65,239 people at the 2010 United States Census, making it the second-largest incorporated city in Maryland, behind Baltimore. Frederick is home to Frederick Municipal Airport (IATA: FDK), which accommodates general aviation, and to the county's largest employer U.S. Army's Fort Detrick bioscience/communications research installation.