Fountainhead Park borders Fairfax Station and Clifton, Virginia, with land-use restrictions adjacent to the park to protect the water supply for half of Fairfax County, as well as the natural ecosystems.

The park contains rolling hills, dense forests, and a stream (now a reservoir) that flows into the Potomac River.

The park's unique feature for Northern Virginia is the 10.9 miles (17.5 km) mountain biking trail which was improved and rehabilitated by the Fountainhead Project, funded by a grant, local and state government resources along with business and private donations.

Guided canoe trips and paddleboard lessons are offered during the summer.

Boats launched from the park (fee charged) are limited to motor sizes at or under 10 horsepower.