Lewis and Clark
- National Geographic Lewis and Clark has an interactive journey log, expedition records, and photos of the expedition.
- Discovering Lewis and Clark contains a vast archive of primary and secondary sources documenting Native Nations, journal logs, and information about the expedition.
- The Journals of the Lewis and Clark Expedition contains a wealth of primary and secondary sources documenting the journey to the Pacific Ocean and return trip home.
- Lewis and Clark - The Journey of the Corps of Discovery is a PBS site that has Archives, an Interactive Trail Map, and other information about the entire trip.
- Missouri River provides a great deal of information about the history of the river and explorers who attempted to find the Northwest Passage.
- Lewis and Clark Wikipedia page has a lot of great background information about the explorers, expedition, and the exploration of the Louisiana Territory.
- Lewis & Clark Historic Trail provides detailed timelines of the expedition and a lot of succinct sections of many of the journal entries.
- Teaching With Documents: The Lewis and Clark Expedition shares a variety of primary and secondary sources that provide background about the journey through the Louisiana Territory.
- Sacagawea is a page on the History Channel website that explores her life and how it was connected with the Lewis and Clark Expedition.