Lewis and Clark's Corps of Discovery reached the headwaters of the Missouri River and named the three tributaries in July, 1805. With great difficulty the Corps of Discovery fought rapids and troublesome mosquitoes as they pulled their boats upstream to the west. On their return trip in 1806, Exped   from hmdb.org  

Through exhibits, ranger-led programs and walks, movies, children's camps, and workshops, visitors get a personal sense of President Thomas Jefferson's vision of expanding America westward. Outdoors trails and massive glass windows in the center atop bluffs provide views of the Missouri River and t   from museumstuff.com