The lush and fertile valley lies between Catoctin Mountain and the Bull Run Mountains to the east and the Blue Ridge Mountains to the west. To the north it is bound by the Potomac River and to the south by the Broken Hills of Fauquier County.
The lush valley lies nestled between Catoctin Mountain and the Bull Run Mountains on the eastern side, and the Blue Ridge Mountains to the western side. The Potomac River bounds it to the north, while the Broken Hills of Fauquier County enclose it to the south.