Lewis and Clark National Historic Trail Auto Route Road Network

A geospatial dataset highlighting the official National Park Service centerline of the Lewis and Clark National Historic Trail Auto Route. The spatial data was created by the National Park Service with assistance from U.S. Department of State interns, derived from U.S. Census Bureau TIGER/Line road data. The Auto Route connects 16 states, providing the primary way for visitors to experience the trail commemorating the 1803-1806 expedition.

Use Cases

• Map historical travel corridors based on the designated Lewis and Clark Auto Route.
• Analyze road network connectivity across 16 states for tourism planning.
• Integrate with other geospatial layers for cultural heritage site analysis based on the trail's spatial data.

Strengths

• Official National Park Service centerline data.
• Covers a route connecting 16 U.S. states.
• Derived from authoritative U.S. Census Bureau TIGER/Line data.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Park Service, Department of the Interior

Collection Method

Derived from U.S. Census Bureau TIGER/Line shapefiles.

Time Range

Commemorates the 1803-1806 expedition; data creation date unspecified.

Freshness

Last updated 2026-03-04 01:05:47.337357; freshness should be verified.

Geography

Roads and highways across 16 U.S. states: Pennsylvania, West Virginia, Ohio, Kentucky, Indiana, Illinois, Missouri, Kansas, Nebraska, Iowa, South Dakota, North Dakota, Montana, Idaho, Washington, and Oregon.