Ahtanum Ridge

It is located just south of the city of Yakima, and much of its length is at the northern edge of the Yakama Indian Reservation.

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

At the eastern end of Ahtanum Ridge the Yakima River flows through Union Gap.

The ridge continues east of Union Gap as the Rattlesnake Hills.

This Yakima County, Washington state location article is a stub.