Seasonal route: The road is subject to closure in winter. In May 1980, Mount St. Helens erupted, shooting ash and smoke 80,000 feet into the air and causing a mile-wide avalanche. FR 99 takes you deep into Mount St. Helens National Monument to see the aftermath of nature’s fury - as well as its rebirth. Flowers and trees have begun to cover the mountain’s barren shoulders, and Spirit Lake is still a scenic spot.
