State Corner - District of Columbia/Maryland Near Silver Spring, MD
Posted by: 
Ernmark
N 38° 59.760 W 077° 02.458
18S E 323251 N 4318314
A stone post marks the northernmost 90° turn of the District of Columbia - one of 4 corners which were placed to mark the diamond-shaped layout of 'DC' - 3 of which remain as a state border point.
Waymark Code: WMNGEB
Location: District of Columbia, United States
Date Posted: 03/11/2015
Views: 18
This stone is located just S of East-West RD - near the E end of a guard rail and at the edge of a wooded area. The stone is inside a low circular iron fence with a small plaque on the N side.
The plan to set up a 10-mile per side diamond-shaped plot of land for the United States Capital City was established in 1790, with surveying commencing the following year - beginning with the South Stone & moving clockwise from there.
Even with the SW portion of the 'diamond' returning to Virginia, most of the stones are still standing - and there have been several subsequent surveys of the stones.
For an interesting & more detailed history of the DC Boundary Stones please see the following link to a site dedicated to these stones - (
visit link)
Additional information is also available on Wikipedia - (
visit link)