The Lewis and Clark Expedition, also known as the Corps of Discovery Expedition, was the United States expedition to cross the newly acquired western portion of the country after the Louisiana Purchas
Portraits of Meriwether Lewis and William Clark
Camp Dubois (Camp Wood) reconstruction, where the Corps of Discovery mustered on the east side of the Mississippi River, through the winter of 1803–1804, to await the transfer of the Louisiana Purchase to the United States
Corps of Discovery meets Chinooks on the Lower Columbia in October 1805 (Lewis and Clark on the Lower Columbia, painted by Charles M. Russell, c. 1905).
Reconstruction of Fort Mandan, Lewis and Clark Memorial Park, North Dakota
The Missouri River is a river in the Central and Mountain West regions of the United States. The nation's longest, it rises in the eastern Centennial Mountains of the Bitterroot Range of the Rocky Mou
The Missouri River in Montana
Holter Lake, a reservoir on the upper Missouri River
The Missouri in North Dakota, which was the furthest upstream that French explorers traveled on the river
The Yellowstone River, the fifth longest tributary of the Missouri, which it joins in North Dakota