Silver Star Mountain (Skamania County, Washington)

Silver Star Mountain is a recently uplifted ridge of older Western Cascades volcanic rock, underlain by a granitic pluton of similar Western Cascades age, located in the Cascade Range in the U.S. state of Washington. (contrary to local legend, the mountain is not an "extinct volcano," but rather the uplifted debris and roots of a number of very old volcanic vents) Consisting of late Eocene to Oligocene epoch rock, it lies within the Gifford Pinchot National Forest.

Source: Wikipedia — Silver Star Mountain (Skamania County, Washington) (CC BY-SA 4.0)