About 20 acres of eastern hemlock trees rooted to the Bull Run River banks in Clifton will be formally recognized tomorrow (Tuesday) as likely the oldest trees in Fairfax County.
Believed to be at least 250 years old, the trees in Hemlock Overlook Regional Park are the first stand in the county and only the second in Northern Virginia to join the Old Growth Forest Network, a national nonprofit that aims to identify and protect the oldest known forests in every county in the U.S.