Landmarks Discovered by Lewis & Clark

Key geographic features documented by the Corps of Discovery (1804–06):

1. Great Falls of the Missouri (MT) – Five waterfalls over 10 miles.
2. Three Forks (MT) – Jefferson, Madison, Gallatin rivers form the Missouri.
3. Lemhi Pass (ID) – Critical Rocky Mountain crossing.
4. Clearwater River (ID) – Major Snake River tributary.
5. Bitterroot Mountains (ID/MT) – Rugged range traversed.
6. Lolo Pass (ID/MT) – Second mountain crossing.
7. Columbia River (PNW) – Followed to the Pacific.
8. Pacific Ocean – First Americans overland to reach it.
9. Multnomah Falls (OR) – Tallest waterfall in Oregon (return trip).
10. Cape Disappointment (WA) – Named for dashed hopes of a Northwest Passage.

These landmarks mapped the West for a young nation.