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1805–1840s

Lewis & Clark & the Fur Trade

The Corps of Discovery passed through the valley in 1805 and 1806, opening a new chapter of contact and change.

6 min readUpdated February 2026

The Corps of Discovery Arrives

On October 16, 1805, the Lewis and Clark expedition — the Corps of Discovery — reached the confluence of the Snake and Columbia Rivers near present-day Pasco, Washington. Over the following days, they passed through the homeland of the Walla Walla people.

On October 19, 1805, the expedition met Chief Yellepit (also spelled Yelleppit) of the Walla Walla people near the mouth of the Walla Walla River. Clark described the chief as welcoming and noted the exchange of gifts. Yellepit urged them to stay, but the expedition pressed on toward the Pacific.

The outbound journey was brief, but it marked the beginning of sustained contact between the Walla Walla peoples and Euro-Americans.

The Return Journey, 1806

On their return east in the spring of 1806, Lewis and Clark spent more time in the Walla Walla region. They camped near Chief Yellepit's village from April 27 to April 29, 1806.

During this visit, Yellepit hosted the expedition generously, providing food and canoes for river crossing. In exchange, the Americans gave Yellepit a medal, a pistol, and ammunition. The journals describe dancing, feasting, and trade between the two groups.

The return visit was longer and friendlier than the outbound passage, and the expedition's journals provide some of the earliest written descriptions of the Walla Walla Valley and its people from a Euro-American perspective.

The Fur Trade Era

Following Lewis and Clark, the fur trade brought a wave of trappers, traders, and companies into the region. The North West Company and later the Hudson's Bay Company established trading operations across the Columbia Plateau.

Fort Nez Percés (Fort Walla Walla): In 1818, the North West Company built Fort Nez Percés near the confluence of the Walla Walla and Columbia Rivers. After the merger with the Hudson's Bay Company in 1821, it was renamed Fort Walla Walla and became an important trading post.

The fur trade era brought significant changes. Euro-American traders introduced new goods, diseases, and pressures on Indigenous communities. Trade relationships were complex — sometimes cooperative, sometimes exploitative — and they reshaped the social and economic landscape of the valley.

By the 1840s, the fur trade was declining as beaver populations dropped and fashion shifted away from beaver felt hats. But the trading posts and trails established during this era would shape the routes of future settlement.

Sources

1
Journals of the Lewis and Clark Expedition (University of Nebraska-Lincoln)

Primary source: digitized journals from the expedition with searchable entries for October 1805 and April 1806.

2
National Park Service — Lewis and Clark National Historic Trail

NPS overview of the Lewis and Clark trail including the Walla Walla segment.

Frequently Asked Questions

The expedition first passed through in October 1805, meeting Chief Yellepit on October 19. They returned in April 1806, staying with Yellepit's people from April 27 to 29.
Yellepit was a chief of the Walla Walla people who hosted Lewis and Clark during both their westbound and eastbound journeys. The expedition journals describe him as welcoming and generous.
Fort Nez Percés was a fur trading post built by the North West Company in 1818 near the confluence of the Walla Walla and Columbia Rivers. After the merger with the Hudson's Bay Company in 1821, it was renamed Fort Walla Walla.

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Sacajawea State Park

Located at the confluence of the Snake and Columbia Rivers where the expedition passed through in October 1805. Interpretive center with exhibits on the expedition and local tribes.

Pasco, Washington (about 60 miles from Walla Walla)

Lewis & Clark & the Fur Trade | History of Walla Walla | Walla Walla Travel