The longest continuous
escalator in the United States
and the Western Hemisphere is located in Washington
D.C. It is at the Wheaton station of the
Washington D.C. Metro system. It is 230 feet long with a vertical rise of 115
feet. It can take approximately 2 minutes 45 seconds to ascend or descend
without walking.
Source: http://en.wikipedia.org/wiki/Wheaton_%28Washington_Metro%29
