Iron Mountain is a mountain summit located in Mount Rainier National Park in Pierce County of Washington state. Part of the Cascade Range, it is situated near the base of the Success Cleaver, overlooking Indian Henry's Hunting Ground. Its nearest higher peak is Copper Mountain, to the north. The summit provides views of Mount Rainier, Mount Adams, Mount St. Helens, Mount Wow, and peaks of the Tatoosh Range. Precipitation runoff from Iron Mountain drains into Tahoma Creek, Devils Dream Creek, and Fishers Horn Pipe Creek, which are all tributaries of the Nisqually River. There were great hopes in the late 1800s that mines on Mount Rainier could be a source of precious metals such as copper, silver, and gold. Dark reddish rock found on Iron Mountain was thought to be iron or iron oxide. Its name was officially adopted in 1932 by the United States Board on Geographic Names.