On Tuesday, July 24, 2018, Mount Vernon lost a piece of living history—a white oak tree dating to Washington’s time. Located away from public access, the historic tree that lived through the Civil War fell due to the overly saturated ground.
The oak’s trunk had a circumference of almost 12 feet (46 inches in diameter). Between 2004 and 2005, dendrochronologists took a core sample of the white oak to determine its age. They stated that the tree's age was no later than 1780, meaning that tree rings could accurately be counted to 1780, but that some rings were indistinguishable indicating the tree is actually older. According to Mount Vernon’s Director of Horticulture, Dean Norton, the tree had definitely been standing for 238 years and even longer, but the exact date cannot be determined.