Umtanum Ridge Water Gap, National Natural Landmark in Yakima Canyon, Washington, United States
The Yakima River flows through a deep canyon carved between steep basalt cliffs, creating a natural passage through Umtanum Ridge.
The geological formations date back millions of years when massive Columbia River basalt flows shaped the foundation of this landscape.
Geologists and researchers frequently visit this site to study the complex folding patterns and geological processes visible in the rock formations.
Visitors can access the site via Washington State Route 821, which follows the Yakima River through the canyon between Ellensburg and Yakima.
The water gap reveals preserved river meanders that demonstrate how the Yakima River maintained its course while geological forces pushed the surrounding rock upward.
Location: Washington
GPS coordinates: 46.85000,-120.54400
Latest update: March 2, 2025 20:30
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