- States: ID, IL, IA, KS, MT, NE, ND, OR, MO, SD, WA
- NPCA Region: Northwest
- Est. Date: 1958
Air Quality Conditions
View the Polluted Parks ReportVisibility
Unsatisfactory
Health
Unsatisfactory
Nature
Significant Concern
This trail commemorates Lewis and Clark's ambitious 1804 expedition to discover a water route to the Pacific Ocean. Stretching through 11 states, over mountaintops, along roaring rivers, through native prairies, and along the Pacific coast, the diverse landscapes that make up the trail tell larger stories of the American narrative, including historic perspectives on foreign affairs, gender and race questions, and American Indian sovereignty.
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