"Banks Lake" by NPS/Dubar , public domain

Ice Age Floods

Lake Lewis (Southeast WA)

brochure Ice Age Floods - Lake Lewis (Southeast WA)

Brochure of Lake Lewis (Southeast WA) 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