Mount St. Helens, located just 50 miles northeast of Portland, Oregon, has been attracting thousands of visitors each year since its famous erruption in 1980. In 1982, Congress set aside the 110,000-acre monument to allow the volcanically-altered landscape to recover at its own pace and to provide for research, educational, and recreational opportunities. Exploring Mount St. Helens is a comprehensive guide to this world-renowned attraction,...