1990 Map – Lewis and Clark in the Rocky Mountains Idaho|Lewis and Clark Expedition|Lewis and Clark National Historic Trail|Montana|Rocky Mountains|Trails|United States Notes: Relief shown by spot heig

1990 Map – Lewis and Clark in the Rocky Mountains Idaho|Lewis and Clark Expedition|Lewis and Clark National Historic Trail|Montana|Rocky Mountains|Trails|United States Notes: Relief shown by spot heig

August 23, 2023

1990 Map - Lewis and Clark in the Rocky Mountains Idaho|Lewis and Clark Expedition|Lewis and Clark National Historic Trail|Montana|Rocky Mountains|Trails|United States Notes: Relief shown by spot heig

1990 Map – Lewis and Clark in the Rocky Mountains Idaho|Lewis and Clark Expedition|Lewis and Clark National Historic Trail|Montana|Rocky Mountains|Trails|United States Notes: Relief shown by spot heig