Lewis and Clark Camp on Jefferson River, 1805

Location: Three Forks, Gallatin County

On July 31, 1805, the Lewis and Clark Expedition made camp along the Jefferson River, near present-day Three Forks, Montana. This location was significant as it was close to the confluence of the three rivers (Jefferson, Madison, and Gallatin) that form the Missouri River. The expedition spent several days in this area, exploring and making astronomical observations, as they prepared for the challenging journey ahead into the Rocky Mountains. This camp was a crucial point for resupply and planning, highlighting the meticulous nature of their exploration and their efforts to map the vast Louisiana Purchase.