Lewis and Clark Trail
The Lewis and Clark Trail is a highway that approximates the path taken by the Lewis and Clark Expedition in 1804–06, between St. Louis, Missouri and the Pacific Ocean at Astoria, Oregon. Like the Great River Road, it is marked along existing roadways, in this case mostly paralleling the Missouri and Columbia rivers.
Roads followed include Interstate 29 in Iowa, the appropriately-numbered SD 1804, ND 1804, SD 1806, and ND 1806, and Washington State Route 14. Two separate routes of the trail are signed between St. Louis and East Fairview, North Dakota, one on each side of the Missouri.
The trail was conceived in the 1960s by the Lewis and Clark Trail Commission.
- Lewis and Clark Trail Commission (October 1969). Final Report of the Lewis and Clark Trail Commission (PDF) (Report). OCLC 129076.
- "Washington Scenic Byways Map" (PDF). WSDOT. Retrieved June 11, 2018.