Page "Lewis and Clark Expedition" Paragraph 14

Later in 1792 the Vancouver Expedition explored over up the Columbia, into the Columbia River Gorge.

Lewis and Clark carried a copy of Vancouver's map of the lower Columbia.

By 1800 the coast of the Pacific Northwest had been thoroughly explored by maritime fur traders.

By the time Lewis and Clark arrived at the mouth of the Columbia, at least 14 maritime fur traders had already visited the river's mouth and estuary.