10,558 feet (3,218 m) is a mountain peak in the northeast section of Yellowstone National Park, in the Absaroka Range of the U.S. state of Wyoming.

Named by members of the Arnold Hague Geological Survey of 1885 for its propensity to attract thunderstorms, the mountain is a long high ridge just north of Mount Norris.

[3] The Thunderer is easily visible from the northeast entrance road as it passes up the Soda Butte Creek canyon.

The north end of the ridge can be reached via the 7.4 miles (11.9 km) Thunderer Cutoff Trail.

The trailhead is located just opposite the Pebble Creek Campground on the northeast entrance road.