Lemhi Pass

Quick Facts

Location:

Lemhi County, ID/Beaverhead County, MT

Significance:

Corps crossed the Continental Divide

Designation:

National Register of Historic Places, National Historic Landmark

MANAGED BY:

US Forest Service

Lewis and Clark NHT Visitor Centers and Museums

This map shows a range of features associated with the Lewis and Clark National Historic Trail, which commemorates the 1803-1806 Lewis and Clark Expedition. The trail spans a large portion of the North American continent, from the Ohio River in Pittsburgh, Pennsylvania, to the mouth of the Columbia River in Oregon. The trail is comprised of the historic route of the Lewis and Clark Expedition, an auto tour route, high potential historic sites (shown in black), visitor centers (shown in orange), and pivotal places (shown in green). These features can be selected on the map to reveal additional information. Also shown is a base map displaying state boundaries, cities, rivers, and highways. The map conveys how a significant area of the North American continent was traversed by the Lewis and Clark Expedition and indicates the many places where visitors can learn about their journey and experience the landscape through which they traveled.

Lemhi Pass is a High Potential Historic Site on the Lewis and Clark National Historic Trail.

On August 9, 1805, Lewis departed the main group with a scouting party that included Drouillard, Shields, and McNeal. Their objectives were to “find a portage if possible” and make contact with the Shoshone Tribe in order to acquire horses. A few days later, on August 12, Lewis crossed the continental divide through Lemhi Pass. This marked the point of departure from both United States-controlled territory and the Mis­souri River watershed. Lewis wrote, “two miles below McNeal had exultingly stood with a foot on each side of this little rivulet and thanked his god that he had lived to bestride the mighty & heretofore deemed endless Missouri. after refreshing ourselves we proceeded on to the top of the dividing ridge from which I discovered immence ranges of high mountains still to the West of us with their tops partially covered with snow. I now decended the mountain about ¾ of a mile which I found much steeper than on the opposite side, to a handsome bold running Creek of cold Clear water. here I first tasted the water of the great Co­lumbia river.” Following successful contact with the Shoshone and acquition of horses, the full expedition crossed the pass on August 26.

The pass was named in 1855 by Mormon missionaries for King Limhi, a character from the Book of Mor­mon. Located in the Beaverhead Mountains of the Bitterroot Range, it spans about two miles across the boundary between Montana and Idaho. Lemhi Pass is encompassed by two national forests – Beaverhead- Deerlodge National Forest in Montana, and Salmon-Challis National Forest in Idaho.