The Geology of Walla Walla Wine Country
Discover how ancient floods, volcanic eruptions, and millions of years of geology created one of the world's most unique wine regions.
Did You Know?
Fascinating facts about Walla Walla's geological heritage
The Missoula Floods released more water in 48 hours than all the rivers in the world combined carry in a year.
mind blowing
Wind-blown loess deposits in some Walla Walla vineyards exceed 100 feet in depth.
statistic
The floods traveled at speeds up to 65 mph—faster than most rivers flow during major hurricanes.
comparison
Walla Walla's unique combination of basalt, loess, and flood deposits exists nowhere else on Earth.
wine connection
Some vineyards have vine roots extending 30+ feet deep through multiple geological layers.
wine connection
Featured Topics
Start your geological journey here
The Missoula Floods
How catastrophic floods shaped wine country
Discover how catastrophic Ice Age floods created the unique soil conditions that make Walla Walla wine country so special.
The Basalt Foundation
Ancient lava flows beneath your feet
Explore the ancient volcanic eruptions that created the basalt bedrock underlying Walla Walla wine country.
More Topics
Deep dives into Walla Walla's geological story
Meet Your Guide
Kevin Pogue, Geologist
Kevin Pogue has spent decades studying the geological forces that shaped Walla Walla wine country. A geologist by training and a storyteller by nature, he brings the landscape to life — connecting ancient floods, volcanic basalt, and windblown soils to the wines you taste today.
Kevin leads small-group tours in a comfortable Sprinter van, taking guests to the formations and vineyards where geology and wine intersect. Whether you're new to wine or a seasoned enthusiast, his tours offer a perspective you won't find anywhere else in the valley.
Explore Wine Country with a Geologist
Join Kevin Pogue for a small-group tour in a comfortable Sprinter van. He'll connect the landscape's geological story to the wines you taste — from ancient flood channels to the vineyards planted on them today.
Tours are customized for your group. We'll help you find the right experience.