After 150' on the dirt road, go right on Fishers Peak Road. Almost immediately bear left through a gate onto a gray stone road. The gate is posted with warnings of radiation hazards at the summit. Being past child-making age, I was willing to absorb a few microwaves.
High ground is obvious.
I looked for the state line monument shown on the topo to mark the Carroll VA liner high point, but found nothing. Round trip hike, with five minutes on top, was about 30 minutes.