"The Lewis and Clark Herbarium," University of Maryland and Academy of Natural Sciences in cooperation with Cornell University http://www.plantsystematics.org/reveal/pbio/LnC/LnCpublic.html

Discovering Lewis and Clark, The Lewis and Clark Expedition http://www.lewis-clark.org/index.htm

If you go to Discovery Path and choose Native Nations, there are specific stories of various tribes" interactions the Lewis and Clark.

Lewis and Clark http://www.nationalgeographic.com/lewisandclark

This National Geographic interactive website effectively uses historical maps, journals, and notes of discoveries to bring the Lewis and Clark journey alive.

Lewis and Clark on the Information Superhighway http://www.lcarchive.org/

This clearinghouse website lists many websites related to the Lewis and Clark expedition.

Rivers, Edens, Empires: Lewis and Clark and the Revealing of America http://www.loc.gov/exhibits/lewisandclark/

This Library of Congress website contains digital photos and descriptions of artifacts from the Lewis and Clark expedition.