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Links to USGS Science along the Lewis and Clark Trail

Cascades Volcano Observatory

The volcanoes of the Pacific Northwest seen by Lewis and ClarkOn October 7, 1805, Lewis and Clark and the "Corps of Discovery" began their journey down the Clearwater River and into the volcanics of the Pacific Northwest. The Corps travelled from the Clearwater to the Snake and down the "Great Columbia", finally reaching the Pacific Ocean on November 15, 1805. Along the journey they encountered the lava flows of the Columbia Plateau, river channels carved by the great "Missoula Floods", and the awesome beauty of five Cascade Range volcanoes. The USGS Cascades Volcano Observatory has prepared modern interpretations of numerous geologic features in the Pacific Northwest, first described by Lewis and Clark. See a map, modern day by day geologic interpretations, or detailed accounts of current scientific research on the features and landscapes described in the journals. This website features descriptions of: The Volcanoes of Lewis and Clark, The Cascade Range, The Willamette Lowland, The Blue Mountains, The Columbia Plateau, Wallula Gap, The Columbia River, The Pacific Mountain System, Canoe Camp, Ft. Clatsop, and many many others.

Lewis and Clark and the U.S. Geological Survey in North Dakota

The Missouri River before DamsIn North Dakota, the U.S. Geological Survey (USGS) continues many of the scientific investigations begun by Lewis and Clark and the Corps of Discovery. This web site gives a picture of the Missouri River and its tributaries during the early 1800's, via excerpts from the journals of Lewis and Clark, and a picture of the present-day river system, via aerial photographs, USGS data and publications. Because the production of maps was another endeavor common to the Corps of Discovery and the USGS, the web site also provides a historical view of Missouri River and North Dakota maps from 1798 to the present.

Missouri River InfoLink

Missouri River InfoLINKThe Missouri River InfoLINK enhances understanding of the Missouri River. The InfoLINK is for Missouri River stakeholders who represent diverse river interests -- people who want to understand how the river functions and need to make informed decisions about its management. The InfoLINK provides information through outreach materials, interactive maps, and presentations that interpret scientific findings.

Animal Habitats along the Lewis and Clark Trail

Vegetation HabitatAnimal Habitat


Looking for information about historical and current vegetation and animal habitats along the Lewis and Clark Trail? The USGS has numerous scientific publications, research projects, reports, maps and articles for your use.

River Corridor Research along the Lewis and Clark Trail

Web Photo Gallery - Missouri River at Great Falls, MontanaThe U.S. Geological Survey performs numerous investigations of natural resources along the river corridors explored by the Corps of Discovery. These investigations cover a wide variety of topics including: water quality, riverine habitat, ground water under flood plains, and flood-plain wetlands. See descriptions of investigations that document the status and nature of natural resources first observed and documented by Lewis and Clark.

The National Hydrography Dataset (NHD)

National Hydrography Dataset The NHD is a newly combined dataset that provides hydrographic data for the United States. The NHD is the culmination of recent cooperative efforts of the U.S. Environmental Protection Agency (USEPA) and U.S. Geological Survey (USGS). It combines elements of USGS digital line graph (DLG) hydrography files and the USEPA Reach File (RF3). The NHD supersedes RF3 and DLG files by incorporating them, not by replacing them. Users of RF3 or DLG files will find the same data in a new, more flexible format. They will find that the NHD is familiar but greatly expanded and refined.


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