This handy, illustrated guidebook follows the 1803-06 Voyage of Discovery over paved roads, taking readers to all the major Lewis and Clark landmarks between St. Louis, Missouri, and the mouth of the Columbia River in Oregon. The adventure of the trip itself forms the core of the text - guiding readers to sites (presented as individual entries), describing events, tying them all to physical locations. The book describes each of the major Indian cultures encountered by Lewis and Clark and sketches the natural history of the major bioregions along the route, with special attention to some of the plants and animals Meriwether Lewis first described for science. The author follows the material from east to west, dividing it into the following regions: Lower Missouri, Great Plains, Upper Missouri, the Rockies, and the Columbia.