"Banks Lake" by NPS/Dubar , public domain

Ice Age Floods

Glacial Lake Missoula (MT)

brochure Ice Age Floods - Glacial Lake Missoula (MT)

Brochure of Glacial Lake Missoula (MT) 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