On June 6th, 1765, Charles Mason and Jeremiah Dixon placed an oak post at the point on their survey where the West or Mason-Dixon Line (northern boundary of Maryland) intersected with the North Line that formed the boundary between Maryland and the three lower counties of Pennsylvania (later to become Delaware).
The survey divided the lands of the Calverts (Maryland) and the lands controlled by William Penn (Pennsylvania), settling a long running dispute of the two colonies. A crown stone was placed at this location by Mason and Dixon on June 18, 1765. At some point this marker disappeared. The current permanent marker was set at this location in 1849.
The Mason-Dixon survey was a technological wonder in its day. Subsequently, the resultant border would become known as the demarcation symbol between the North and South during the Civil War.
Now, 250 years later, and because of the dedication and the financial support of the community, a new public trail is being constructed to provide access to this unique place in our nation’s history. This four-mile looping trail meanders through mature hardwood forests, rolling meadows, and around wetlands within the White Clay Creek Preserve in Pennsylvania, and the White Clay Creek State Park in Delaware, to the Tri-State Marker.
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I am Jeff Clark, founder of Internet Brothers, producer of this blog, and passionate about hiking. I live in Western NC near the Blue Ridge and Great Smoky Mountains. Pisgah and Nantahala National Forests are just out my door, so the content will focus on these areas, but let me know what you would like to see on the site. 
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