Location: Confluence of Yellowstone and Missouri Rivers, Richland County
On April 27, 1805, the Lewis and Clark Expedition, on their epic journey of exploration, entered what is now the state of Montana, just above the confluence of the Yellowstone and Missouri Rivers. This momentous occasion marked their entry into a vast and uncharted territory, rich in natural resources and home to numerous Native American tribes. Meriwether Lewis, in his journals, recorded the first written history of this region, meticulously documenting the landscape, wildlife, and indigenous cultures encountered. Their passage through Montana was a critical phase of the expedition, contributing immensely to the geographical knowledge of the American West and paving the way for future settlement and development. This date signifies the beginning of recorded American exploration in Montana, forever linking the state to one of the nation's most iconic exploratory endeavors.