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Lewis and Clark National Historic Trail
MWRO
NRRO
NWRO
Idaho
Illinois
Iowa
Kansas
Montana
Nebraska
North Dakota
Oregon
Missouri
South Dakota
Washington
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Mormon Pioneer National Historic Trail
MWRO
NRRO
SWRO
Illinois
Iowa
Nebraska
Utah
Wyoming
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Effigy Mounds National Monument
MWRO
Iowa
National Monument
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Herbert Hoover National Historic Site
MWRO
Iowa
National Historic Site
