On July 18, 1805, the Lewis and Clark Expedition entered what is now Southwest Montana, near present-day Craig. This marked a significant geographical milestone in their journey of exploration. The explorers noted the incredible beauty of the area as they continued their arduous trek up the Missouri River, pushing deeper into uncharted territory. This entry into the mountainous regions of Montana signaled a new phase of their expedition, characterized by challenging terrain and the anticipation of encountering new Native American tribes and vital resources for their westward passage.

Lewis and Clark Expedition Enters Southwest Montana, 1805

On July 19, 1805, the Lewis and Clark Expedition navigated through a dramatic canyon on the Missouri River, which Captain Meriwether Lewis famously named the 'Gates of the Rocky Mountains.' This awe-inspiring passage, characterized by towering limestone cliffs, marked a significant moment in their journey. Lewis described the scene in his journal, noting the 'most remarkable clifts' they had yet encountered. This natural wonder, located north of present-day Helena, served as a crucial landmark and a testament to the challenging yet magnificent landscapes the Corps of Discovery traversed in their exploration of the American West.

Lewis and Clark Pass Through Gates of the Mountains, 1805

On July 17, 1805, Captain William Clark and the main body of the Lewis and Clark Expedition reunited with Captain Meriwether Lewis near Tower Rock, a prominent geological feature along the Missouri River in present-day Cascade County, Montana. Lewis had been scouting ahead, and their reunion marked a significant moment as the expedition continued its arduous journey upstream towards the Rocky Mountains. This meeting allowed the Corps of Discovery to consolidate their findings and strategize for the challenging terrain ahead, further solidified their progress in exploring the vast and uncharted Louisiana Purchase.