Fairfax Stone State Park, Boundary stone and state park in Preston County, West Virginia, United States

The Fairfax Stone is a six-ton rock with a flat face, set in a four-acre West Virginia state park six miles north of Thomas. It bears an inlaid plaque explaining its role as a boundary marker at the source of the North Branch Potomac River. The 1910 stone stands next to it.

Colonel Peter Jefferson and Thomas Lewis placed the original stone in 1746 to mark the boundary of Lord Fairfax's land grant. This act of surveying shaped how territories were divided during the colonial period and influenced later settlement patterns.

The stone shows how colonial surveyors marked land boundaries and property claims in the early days of America. Visitors can stand at this exact spot and see how these old borders still shape the region today.

The park is open year-round and accessible by a short walking path to the stone monument. Plan to visit during warmer months when the ground is dry and easier to navigate, as the area can be muddy during wetter seasons.

The original 1746 stone was a natural, unmarked rock; it disappeared by 1909, carried off by vandals. Six stones have replaced it, and the present six-ton rock, with an inlaid plaque, was dedicated on October 5, 1957. The 1910 stone stands beside it.