The Ice Age Floods

The Tri-Cities region was shaped by a series of massive floods at the end of the last Ice Age, known as the Missoula Floods or Ice Age Floods. Over 13,000 years ago, ice dams repeatedly burst, releasing torrents of water that carved deep channels, eroded rock formations, and reshaped the Columbia Basin. These floods left behind the striking landscapes seen today, including the Channeled Scablands, the Columbia River Gorge, and the towering White Bluffs.

The region is part of the Ice Age Floods National Geologic Trail, a designated route highlighting key sites across the Pacific Northwest that showcase the power of these ancient floods. Visitors can explore locations like Wallula Gap, Badger Mountain, and Palouse Falls to see the lasting effects of these events. Learn more about the trail at the National Park Service website.

For those wanting to dive deeper into the story of the Ice Age floods, The REACH Museum in Richland offers engaging exhibits on the region’s geological history, the Manhattan Project, and local ecosystems. Plan your visit at The REACH Museum.
With four national parks, monuments, and trails in the area, the Tri-Cities offers incredible opportunities to experience both ancient geological forces and the stories of those who traveled through this dynamic landscape.

Expand Your Mind In Tri-Cities

Lewis & Clark Interpretive Overlook Learn More
American World War II Heritage City World War II permeated every aspect of American life and resulted in a large migration of… Learn More