Roaring Mountain is a thermal feature located in Yellowstone National Park about four and a half miles from the Norris Geyser Basin. This barren ridge is lined with fumeroles, or steam vents. Steam rushing from the fumeroles is how Roaring Mountain got its name. Sulfuric acid from the steam has given the ridge its barren look. Leaving a bleached white mass of rock jutting 400 feet up into the contrasting blue sky.