The discovery of Lehmi Pass—located in the Beaverhead Mountain of the Bitterroot Range in the Rocky Mountains along the Idaho/Montana border—by Meriwether Lewis of the Lewis and Clark Expedition in 1808 was perhaps the expedition's most important event. Here, Lewis and three members of the expedition found a two mile pass that traversed the imposing Continental Divide, the mountain range that stretches from north to south along the entire North American continent. At the time, the divide marked the western edge of the Oregon Territory and thus U.S territory; the lands westward were claimed by European powers. Lewis and the three others were the first known whites to enter this territory. The pass is a National Historic Landmark and is also listed on the National Register of Historic Places. A large boulder marks the location of the pass. The trail is a simple gravel road.
Backstory and Context