The Hudson Valley refers to all
areas and towns
along the Hudson
River, including the Bronx or even Bergen
County, New Jersey.
However, this definition is not commonly used and the Tappan Zee Bridge
is often considered the southern limit of the Hudson
Valley. New York
state defines the Hudson Valley region on the Thruway
as Exit 9, Tarrytown
though 21A, Berkshire Section/to Mass Pike.