"Banks Lake" by NPS/Dubar , public domain

Ice Age Floods

Coeur du Deluge (North ID)

brochure Ice Age Floods - Coeur du Deluge (North ID)

Brochure of Coeur du Deluge (North ID) part of Ice Age Floods National Geologic Trail (NGT) in Washington, Oregon, Idaho and Montana. Published by the Ice Age Floods Institute

source

iafi.org

also available

National Parks
USFS NW