Mount Wow is a prominent mountain summit located in the southwest corner of Mount Rainier National Park, in Pierce County of Washington state. It is part of the Cascade Range, and lies southwest of the summit of Mount Rainier. Its nearest higher neighbor is Iron Mountain, to the east-northeast. Precipitation runoff from Mount Wow is drained by Tahoma Creek on the east side of the mountain, whereas Goat Creek drains the west side of it, and both are tributaries of the Nisqually River.