Fairfax County trip planner

Fairfax County is the most populous commonwealth in the state, and is best known for sheltering national intelligence groups such as the Central Intelligence Agency. The county played a vital role in early American history--it was explored by Captain John Smith, and George Washington built Mount Vernon atop one of its hills. The Potomac River separates the area from Washington, D.C. Communities within the county are connected by well-maintained bike lanes that allow residents to commute to work through the countryside. When using our United States trip itinerary tool, you're building your holiday based on your own interests, visitor reviews, and the informed opinions of our well-traveled writers.