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Near Reid in Washington County, Maryland — The American Northeast (Mid-Atlantic)
MISSING
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Mason and Dixon Line

100th Mile Stone

 
 
Mason and Dixon Line Marker image. Click for full size.
Photographed by F. Robby, June 2, 2008
1. Mason and Dixon Line Marker
Inscription. Maryland-Pennsylvania boundary line. Surveyed and marked 1763-68 by two English astronomers, Charles Mason and Jeremiah Dixon. This is one of the "Crown" stones, set every five miles displaying the coat of arms of Lord Baltimore on south and Penns on north sides. Intermediate miles marked by stones with M facing Maryland and P Pennsylvania. Stones imported from England.
 
Erected 1936 by State Roads Commission.
 
Topics and series. This historical marker is listed in this topic list: Colonial Era. In addition, it is included in the Maryland Historical Trust series list.
 
Location. Marker is missing. It was located near 39° 43.245′ N, 77° 40.365′ W. Marker was near Reid, Maryland, in Washington County. It was on Marsh Road 0 miles east of Marsh Pike, on the right when traveling east. Touch for map. Marker was at or near this postal address: 16087 Marsh Rd, Hagerstown MD 21742, United States of America. Touch for directions.

Regionally, this marker was in the Baltimore Metro Region and in Western Maryland. It was also in the American Mid-Atlantic, in Appalachia, and specifically in Northern Appalachia. Globally, it was in the North Atlantic Region, North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it found itself in what was once one of the original Thirteen Colonies.

Other nearby markers. At least 8 other markers are within 4 miles of this location, measured as the crow flies: The Long Meadow (approx. 1.9 miles away); Paradise Manor (approx. 2.2 miles away); Gettysburg Campaign (approx. 2.9 miles away in Pennsylvania); Leitersburg Bridge No. 2
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(approx. 3 miles away); Erected in Honor of the Boys of Leitersburg District (approx. 3.3 miles away); Retreat into Maryland (approx. 3½ miles away); a different marker also named Gettysburg Campaign (approx. 3½ miles away); Good-Hartle Farm (approx. 3.6 miles away).
 
Mason and Dixon Line Marker image. Click for full size.
Paula Stoner Dickey - Maryland Historical Trust (Historic Sites Survey), June 1974
2. Mason and Dixon Line Marker
Mason and Dixon Line Marker image. Click for full size.
Photographed by F. Robby, June 2, 2008
3. Mason and Dixon Line Marker
Roadside view of the marker, complete with farm animals.
The Mile Stone image. Click for full size.
Maryland Historical Trust (Historic Sites Survey)
4. The Mile Stone
Mason and Dixon Line Stone image. Click for full size.
Photographed by F. Robby, June 2, 2008
5. Mason and Dixon Line Stone
The North (Pennsylvania) side of the stone, which sits across the road from the historical marker.
Mason and Dixon Stone image. Click for full size.
Photographed by F. Robby, June 2, 2008
6. Mason and Dixon Stone
South (Maryland) side of the stone with Lord Baltimore's coat of arms.
 
 
Credits. This page was last revised on January 1, 2025. It was originally submitted on March 10, 2008, by Christopher Busta-Peck of Shaker Heights, Ohio. This page has been viewed 2,650 times since then and 88 times this year. Last updated on February 12, 2022. Photos:   1. submitted on June 3, 2008, by F. Robby of Baltimore, Maryland.   2. submitted on March 10, 2008, by Christopher Busta-Peck of Shaker Heights, Ohio.   3. submitted on June 3, 2008, by F. Robby of Baltimore, Maryland.   4. submitted on March 10, 2008, by Christopher Busta-Peck of Shaker Heights, Ohio.   5, 6. submitted on June 3, 2008, by F. Robby of Baltimore, Maryland. • Devry Becker Jones was the editor who published this page.
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Jun. 7, 2026