Near Pomeroy in Garfield County, Washington — The American West (Northwest)

Lewis and Clark Expedition

Photographed by Barry Swackhamer, August 16, 2020

1. Lewis and Clark Expedition Marker

Inscription. Early in May, 1806, Captains Meriwether Lewis and William Clark, with a 30-man party and 23 pack horses passed eastward through this roadless area after wintering near the ocean at the western terminus - Fort Clatsop. They were short of food, horses and trade goods, living on the land from day to day. From the Snake River Crossing, these intrepid explorers crossed the Rocky Mountains and were boisterously welcomed at St. Louis on September 23. Their overland trip to the Pacific Ocean was a factor in establishing American claims to the Oregon County.

Erected by Historical Sites and Markers Commission, State Highway Commission.

Topics. This historical marker is listed in this topic list: Exploration.

Location. 46° 26.139′ N, 117° 25.448′ W. Marker has been reported damaged. Marker is near Pomeroy, Washington, in Garfield County. It is on U.S. 12 at milepost 414 near Sweeney Gulch Road, on the right when traveling east. The marker is at the Alpowa Summit Rest Area. Touch for map. Marker is in this post office area: Pomeroy WA 99347, United States of America. Touch for directions.

Regionally,

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this marker is in the Palouse.

It is also in the American Mountain West

and in the Lewis & Clark Corridor.

Globally, it is in North America,

on the Pacific Rim,

in the Western Hemisphere,

in the Western World,

and in the Anglosphere.

Other nearby markers. At least 6 other markers are within 9 miles of this location, measured as the crow flies: "the Soil is extreamly fertile" (here, next to this marker); Ancient Crossroads (approx. 3.3 miles away); Lewis & Clark Historic Trail (approx. 7.6 miles away); Historic Ground (approx. 8.3 miles away); Garfield County GAR Monument (approx. 8.8 miles away); Three Forks Indian Trails. (approx. 8.8 miles away).

More about this marker. Duplicate markers are located at the rest area on the opposite side of the highway.

Photographed by Barry Swackhamer, June 15, 2026

2. Lewis and Clark Expedition Marker

Photographed by Barry Swackhamer, August 16, 2020

3. Lewis and Clark Expedition Marker

Credits. This page was last revised on September 26, 2026. It was originally submitted on November 4, 2020, by Barry Swackhamer of Brentwood, California. This page has been viewed 425 times since then and 58 times this year. Photos: 1. submitted on November 4, 2020, by Barry Swackhamer of Brentwood, California. 2. submitted on September 26, 2026, by Barry Swackhamer of Brentwood, California. 3. submitted on November 4, 2020, by Barry Swackhamer of Brentwood, California.