Category Archives: National Geologic Trail

Ice Age Floods National Geologic Trail (WA, OR, ID, MT)


Too Huge to Believe
“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.”