16 States-4900 miles-1 Lewis and Clark National Historic Trail
“No American exploration looms larger in U.S. history. The Lewis and Clark Expedition has been commemorated with stamps, monuments, and trails and has had numerous places named after it. St. Louis hosted the 1904 World’s Fair during the expedition’s centennial, and Portland, Oregon, sponsored the 1905 Lewis and Clark Exposition. In 1978 Congress established the 3,700-mile (6,000-km) Lewis and Clark National Historic Trail”
To read more click here
