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Survey of
Historic Sites and Buildings
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Lemhi Pass
Idaho-Montana
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Location: On the Continental Divide in Lemhi County,
Idaho, and Beaver head County, Mont. Along a rough, dirt road that
extends east from Idaho 28 just south of Tendoy, Idaho, some 12 miles to
the summit of the pass and then continues almost the same distance to
its junction with Mont. 324. The junction occurs at a ranch on Trail
Creek where the latter road switches from a general north-south to
west-east direction about 22 miles west of I-15.
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Probably no other area on the westbound route of the
expedition is associated with so many events crucial to its success as
is Lemhi Pass and vicinity. Moving through the pass in August 1805, the
party crossed the Continental Divide, the first U.S. citizens on record
to do so. At the same time, while passing from the upper reaches of the
eastward-flowing waters of the Missouri drainage to the Pacific slope of
the Rockies and the westward-wending waters of the Columbia system, the
explorers also traversed the boundary of newly acquired Louisiana
Territory and thus moved from the United States into a region claimed by
various European powers.
Also, in the pass area, Lewis and Clark encountered
the Shoshonis, the objective ever since leaving the Mandan villages, in
present North Dakota, and upon whom all hopes of crossing the Bitterroot
Mountains depended. Fortuitously, the chief of the band was Cameahwait,
Sacagawea's brother, whom she reunited with at Camp Fortunate, Mont.,
east of Lemhi Pass; his village lay to its west. On August 30 the
expedition, utilizing Indian guides, horses, and food, pushed northward
from the Shoshoni village toward the Lolo Trail. On the return from the
Pacific, neither the Lewis nor Clark elements of the expedition crossed
Lemhi Pass.
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View from south to north across the shallow saddle of Lemhi Pass. The
fence separates Montana, on the right, from Idaho, on the left, and
traces the Continental Divide at this point.
(National Park Service (Mattison, 1958).) |
Unlike passes to the north and south that are
traversed by improved roads and have accordingly been much changed by
the hand of man, providentially Lemhi Pass (8,000 feet elevation), in a
remote section of the Beaverhead Range, has remained almost in a
pristine conditionall but unknown except to U.S. Forest Service
employees, prospectors, ranchers, and an occasional student of the Lewis
and Clark Expedition. From the summit, the same wild and majestic scenes
that Lewis and Clark beheld still meet the eyes to the east and
west.

Lemhi Pass. (Beaverhead-Deerlodge National Forest.) |
The only noticeable change is that, instead of the
Indian trail they followed, the route is delineated by the narrow, dirt
access road. At the crest of the pass itself, grassy, rolling slopes
predominate, and visible in all directions are deep valleys and heavily
timbered uplands. In the distance to the west and northwest, even in
July, the snow-covered peaks of the Bitterroot and Salmon River Ranges
glisten in the sky.
The eastern side of the pass is in Beaverhead
National Forest, Mont.; the western, in Salmon National Forest, Idaho.
Some of the land in the area is privately held or is claimed by miners
and is used for ranching and prospecting. The eastern approach to the
pass climbs a rather moderate slope; the western, via Agency Creek, a
considerably steeper grade through frequent high canyon walls and an
occasional narrow meadow.
The pass is unmarked, but the U.S. Forest Service has
installed interpretive markers at the heads of the streams on the east
and west sides of it that Lewis and Clark thought were the beginnings of
the Missouri and Columbia Rivers. The Forest Service plans to
reconstruct the dirt road from Tendoy, Idaho, to the pass to meet modern
standards.
http://www.cr.nps.gov/history/online_books/lewisandclark/site3.htm
Last Updated: 22-Feb-2004
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