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Pony Express National Historic Trail
PARO
SWRO
MWRO
NRRO
California
Colorado
Kansas
Nebraska
Nevada
Missouri
Utah
Wyoming
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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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Oregon National Historic Trail
MWRO
NWRO
NRRO
Idaho
Kansas
Nebraska
Oregon
Missouri
Wyoming
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Mormon Pioneer National Historic Trail
MWRO
NRRO
SWRO
Illinois
Iowa
Nebraska
Utah
Wyoming
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Agate Fossil Beds National Monument
MWRO
Nebraska
National Monument
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Homestead National Historical Park
MWRO
Nebraska
National Historical Park
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Niobrara National Scenic River
MWRO
Nebraska
National Wild & Scenic River
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Scotts Bluff National Monument
MWRO
Nebraska
National Monument
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Missouri National Recreational River
MWRO
Nebraska
South Dakota
National Wild & Scenic River
