Lewis and Clark's Columbia River
Lewis & Clark's Columbia River - "200 Years Later"
"Ice Age Floods National Geologic Trail"
Includes ... Ice Age Floods National Geologic Trail ...
Image, 2018, Ice Age Floods National Geologic Trail, click to enlarge
Click image to enlarge
Ice Age Floods National Geologic Trail. Image taken.


Ice Age Floods National Geologic Trail ...
The "Ice Age Floods National Geologic Trail" spans four state: Washington, Oregon, Idaho, and Montana.

"Crossing four states (Montana, Idaho, Washington, and Oregon) and over a thousand miles, the Ice Age Floods National Geologic Trail offers incredible views and one-of-a-kind geological formations."

"At the end of the last Ice Age, some 12,000 to 17,000 years ago, a series of cataclysmic floods occurred in what is now the northwest region of the United States, leaving a lasting mark of dramatic and distinguishing features on the landscape of parts of the States of Montana, Idaho, Washington and Oregon." [U.S. National Park Service website, 2018]

The "Ice Age Floods National Geologic Trail" is the nation's first geologic trail, created by the "Omnibus Public Land Management Act of 2009", signed into law by President Barack Obana on March 30, 2009.



From the Journals of Lewis and Clark ...

Clark, ...
 




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*River Miles [RM] are approximate, in statute miles, and were determined from USGS topo maps, obtained from NOAA nautical charts, or obtained from the U.S. Army Corps of Engineers website, 2003

Sources:
  • H.R. 146 - "Omnibus Public Land Management Act of 2009", Congress.gov;
  • U.S. National Park Service website, 2018;


All Lewis and Clark quotations from Gary Moulton editions of the Lewis and Clark Journals, University of Nebraska Press, all attempts have been made to type the quotations exactly as in the Moulton editions, however typing errors introduced by this web author cannot be ruled out; location interpretation from variety of sources, including this website author.
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September 2018