Montana State

River with mountain and blue sky in the background
Stout's bar, one of many high eddy bars along the Flathead River just before it joins the Clark Fork River. Gravel deposits some 700 feet above the modern river were left behind when the Clark Fork River valley became a major flow conduit during glacial Lake Missoula drainage.


The state of Montana is where many say "it all started". There would not have been any Ice Age Floods without Glacial Lake Missoula. Evidence of ancient lakes and large volumes of water moving at incredible speeds is all around northwestern Montana. Explore the places of Montana that are important to the Ice Age Floods and the Ice Age Floods National Geologic Trail.
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    Last updated: March 31, 2023

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    Program Manager
    Ice Age Floods National Geologic Trail
    1008 Crest Drive

    Coulee Dam, WA 99116


    (509) 237-9722

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