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."

Public Law 111-11, March 30, 2009

A former Ice Age water fall

Dry Falls Lake

Some scientists think that over 40 floods once flowed again and again across the region.

Last updated: February 29, 2016

Contact the Park

Mailing Address:

Superintendent
Ice Age Floods National Geologic Trail
1008 Crest Drive

Coulee Dam, WA 99116

Phone:

(509) 754-7800

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