Thunder Mountain, Mountain summit in Amador County, California, US.

Thunder Mountain is a summit in the Sierra Nevada with two distinct peaks surrounded by evergreen forests and alpine meadows. The paired peaks create varying elevations and different experiences as you move between them.

The name was given by United States Forest Service personnel, who noted that thunderstorms appear to build up in that area. The mountain lies east of Silver Lake and west of Kirkwood Mountain Resort in the Eldorado National Forest, and its main summit is the highest point in Amador County.

The name was given by United States Forest Service personnel, who noted that thunderstorms seem to build up over this area. The main summit, at 9,414 feet, is the highest point in Amador County, and the mountain lies in the Eldorado National Forest between Silver Lake and Kirkwood Mountain Resort.

Access is via Highway 88 with parking available at the trailhead for visitors. The trail offers marked sections with varying difficulty levels as you progress toward the summit.

Thunder Mountain's main summit, at 9,414 feet (2,869 m), is the highest point in Amador County; a western sub-peak reaches 9,412 feet. The two summits stand close in height, so the county high point is decided by a mere two feet.