The Lewis and Clark National Historic Trail follows the historic routes traveled by the Lewis and Clark Expedition between 1803 and 1806 as they sought to map the continental United States west of the Mississippi River, including lands acquired via the Louisiana Purchase and the Pacific Northwest. Points of interest include Gateway Arch National Park, Tavern Cave, and Big Bend of the Missouri River.
Eastern Terminus: Pittsburgh, Pennsylvania
Western Terminus: West of the Columbia River near present day Astoria, Oregon.
The Lewis and Clark National Historic trail covers nearly 5000 miles and crosses 16 states, including Iowa, Idaho, Illinois, Indiana, Kansas, Kentucky, Missouri, Montana, Nebraska, North Dakota, Ohio, Oregon, Pennsylvania, South Dakota, Washington, and West Virginia.