LECL Lewis and Clark National Historic Trail Congressionally Designated Route

This data set represents the official National Park Service centerline of the route of the Lewis and Clark National Historic Trail designated by Congress (P.L. 90-543, as amended through P.L. 116-9, March 12, 2019). As of 2019, this feature class represents the National Park Service's best approximation of the historic route of the Lewis and Clark Expedition of 1803-1806. The spatial data is derived from data developed by the National Park Service for the Lewis and Clark National Historic Trail Extension Study published in February, 2018 as well as an ArcInfo coverage of the historic channel of the Missouri River developed by James D. Harlan of the University of Missouri; Lewis and Clark overland trail data created by Steve F. Russell of Iowa State University; and Lewis and Clark Trail Maps produced by Martin Plamondon II. The Lewis and Clark National Historic Trail is approximately 4,900 miles long, extending from the Ohio River in Pittsburgh, Pennsylvania to the mouth of the Columbia River in Oregon, following both the outbound and inbound routes of the Lewis and Clark Expedition. The trail connects 16 states (Pennsylvania, West Virginia, Ohio, Indiana, Kentucky, Illinois, Missouri, Kansas, Nebraska, Iowa, South Dakota, North Dakota, Montana, Idaho, Washington, and Oregon) and was established by Congress in 1978 as part of the national trails system (NTS) as one of four original national historic trails. This trail commemorates the 1803-1806 expedition of Lewis and Clark and the Corps of Discovery, which explored the Louisiana Territory and beyond. This epic journey contributed to significant scientific knowledge and profound political, social, economic, cultural, and environmental changes to the lands and the peoples of the North American continent.

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                                            [
  "Corps of Discovery",
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  "LECL",
  "Lewis and Clark",
  "Lewis and Clark National Historic Trail",
  "Lewis and Clark Trail",
  "Louisiana Purchase",
  "Martin Plamondon II",
  "Meriwether Lewis",
  "Steve F. Russell",
  "William Clark",
  "national historic trail",
  "national trails system"
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