Umtanum Ridge Water Gap is a geologic feature in central Washington state in the United States. It was designated a National Natural Landmark in 1980.
The Umtanum Ridge Water is a water gap cut by the Yakima River through Manastash and Umtanum Ridge anticlines, which are part of the Yakima Fold Belt near the western edge of the Columbia River Plateau located in central Washington. This National Natural Landmark is characterized by a series of steep-sided ridges in the Columbia River basalt which are cut through axially by the Yakima River. It is also referred to as the Yakima River Canyon, and is located between the cities of Ellensburg and Yakima. Washington State Route 821, originally the main route between Ellensburg and Yakima, parallels the river through the canyon.
Read more about Umtanum Ridge Water Gap: Geologic History, Locations
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