Lewis and Clark Begin Return Journey from Pacific

Context

President Thomas Jefferson commissioned the Corps of Discovery in 1803 shortly after the Louisiana Purchase, tasking Meriwether Lewis and William Clark with mapping the new western lands, documenting natural resources, and forging relations with Native nations while seeking a viable water route to the Pacific. The party of roughly thirty-three men, plus Sacagawea, her husband Toussaint Charbonneau, and their infant son, left the vicinity of St. Louis in May 1804 and spent the next winter at Fort Mandan on the Missouri River before continuing westward across the Continental Divide.

Reaching the Columbia River estuary in November 1805, the expedition confronted its second harsh winter on the rain-lashed coast. The group voted to relocate to the south bank of the Columbia near present-day Astoria, Oregon, where they constructed a small log fort they named Fort Clatsop after the local Clatsop people. Daily life centered on hunting elk, trading roots and fish with neighboring tribes, and recording observations, yet constant precipitation and dwindling supplies tested the party throughout the 106-day encampment.

What Happened

On March 22, 1806, as storms finally eased, Lewis and Clark resolved to depart the following day. They formally transferred ownership of Fort Clatsop and its furnishings to Chief Coboway of the Clatsops, a frequent trading partner who had shown consistent hospitality. Lewis also left the chief a roster listing every member of the expedition, with instructions to present it to the next trading vessel so word of their Pacific arrival could reach the East should disaster strike on the return leg.

At one o’clock in the afternoon on March 23, the Corps pushed their canoes into the Columbia. Their stores were meager—rifles, powder, tools, and limited quantities of dried fish and roots—after months of attrition. Paddling upstream against swells and currents, they began the long retracing of their route, intending to reconnect with the Nez Perce for assistance crossing the Rockies once more.

Aftermath

The homeward journey brought renewed hardships, including difficult mountain crossings and a violent encounter with Blackfeet warriors near the Marias River, yet the expedition benefited from earlier contacts and knowledge of the terrain. The party reached St. Louis on September 23, 1806, completing a round-trip distance of nearly eight thousand miles in just over two years and four months.

News of their safe return spread quickly through official dispatches and personal letters, confirming the viability of an overland route to the Pacific.

Legacy

The expedition’s journals, maps, and specimens supplied the federal government with the first systematic record of the trans-Mississippi West, shaping subsequent policy on exploration, trade, and territorial claims. Their diplomatic gifts and descriptions helped establish a foundation for American presence in the Oregon Country, influencing the fur trade, missionary activity, and eventual overland migration along the Oregon Trail.

Later generations have viewed the journey as both a landmark of scientific discovery and a catalyst for profound changes in Native societies and the continental landscape, underscoring the complex interplay between exploration and expansion.