Wallula Gap, Water gap and National Natural Landmark in Columbia Basin, Washington, United States.
The Wallula Gap contains steep basalt cliffs rising along both sides of the Columbia River, forming a natural corridor through the landscape.
The gap emerged during the last Ice Age when massive glacial floods carved through volcanic rock formations, creating this distinctive geological feature.
Native American tribes established settlements near Wallula Gap, utilizing the Columbia River's resources and the natural passage for transportation and trade.
Visitors can access multiple observation points along Highway 730, offering clear views of the geological formations and Columbia River below.
The gap processed water flows of 166 cubic kilometers per day during ancient floods, surpassing the volume of all current rivers on Earth combined.
Location: Washington
GPS coordinates: 46.04440,-118.94700
Latest update: May 16, 2025 10:02
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