- Listenly
- Public Library
- Project Gutenberg
- Columbia River — Description and travel
Columbia River — Description and travel — Audiobooks

The Journals of Lewis and Clark, 1804-1806
by William Clark, Meriwether Lewis

History of the Expedition under the Command of Captains Lewis and Clark, Vol. 1.
by William Clark, Meriwether Lewis

The Columbia River: Its History, Its Myths, Its Scenery, Its Commerce
by William Denison Lyman

Down the Columbia
by Lewis R. (Lewis Ransome) Freeman

History of the Expedition Under the Command of Captains Lewis and Clark, Vol. 2.
by William Clark, Meriwether Lewis