Umtanum Ridge

View south of the north slope of Umtanum Ridge

Ponderosa Pine grow along seasonal streams.

Umtanum Ridge is a long anticline mountain ridge in Yakima County and Kittitas County in the U.S. state of Washington. It runs for approximately 55 miles east-southeast from the Cascade Range, through the Yakima Training Center to the edge of the Columbia River at Priest Rapids Dam and Hanford Reach. The eastern end of Umtanum Ridge enters Hanford Reach National Monument and the Hanford Site. Umtanum Ridge is paralleled on the north by Manastash Ridge and on the south by Yakima Ridge. The Yakima River cuts through the ridge at the Umtanum Ridge Water Gap.

Umtanum Ridge is part of the Yakima Fold Belt of east-tending long ridges formed by the folding of Miocene Columbia River basalt flows.^[1]

References

Media related to Umtanum Ridge at Wikimedia Commons

Washington hills and ridges

Eastern Washington

Yakima Fold Belt	Ahtanum Ridge Badger Mountain Beezley Hills Candy Mountain Columbia Hills Frenchman Hills Horse Heaven Hills Manastash Ridge Rattlesnake Hills Rattlesnake Mountain Red Mountain Saddle Mountains Snipes Mountain Umtanum Ridge Wahluke Slope Yakima Ridge

Steptoes	Kamiak Butte Steptoe Butte

Other	Dishman Hills Palouse Hills

Western Washington

Pacific Coast Ranges incl. Olympic Mountains foothills	Black Hills Doty Hills Satsop Hills Willapa Hills

Other	Blue Hills Issaquah Alps Kitsap County

This article is issued from Wikipedia - version of the 9/5/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.