Fairfax Stone Historical Monument

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The Fairfax Stone was a surveyor's marker placed to settle a boundary dispute and to determine the proprietorship and boundaries of a large tract of largely unsurveyed land in the colonies of Maryland and Virginia during the Survey of 1736/37.

A line running north from the stone to the Mason & Dixon Line marks the western boundary of Maryland.

Fairfax Stone Monument marks the beginning of the North Branch of the Potomac River and the location thought to define the original property holdings of Lord Fairfax.

The original stone is believed lost, but a replica is maintained at the original site.