The road is important not only because it is an inter-county connector, but it goes around the back of Dulles Airport, is part of the Loudoun County Parkway, and it provides a shortcut between the Reston / Herndon area and U.S. Route 50.

Baron Cameron Avenue then travels westward through the northern part of Reston to the Herndon border.

When SR 606 enters the town the route changes to Elden Street, the main commercial road of Herndon.

The intersection with the Dulles Greenway is the planned location for the Route 606 station of the proposed Phase 2 of the Silver Line of the Washington Metro.

It passes some single-family houses to the west, and Dulles Airport and some low rise office buildings to the east.

VDOT has plans to widen Elden St. between Van Buren Street and the Fairfax County Parkway (SR 286).