However, this particular boundary is a relatively specialized type, in that three different tectonic plates converge at this location. It is located in Washington, about 55 miles northeast of Portland, Oregon, and 95 miles south of Seattle. Mount St. Helens is a member of the Cascadia volcanic arc, which stretches from British Columbia to Northern California. More info. Geologists call Mount St. Helens a St. Helens National Monument from Seattle: All-Inclusive Small-Group Tour. Prior to 1980, Mount St. Helens had the shape of a conical, youthful volcano sometimes referred to as the Mount Fuji of America. • Visitor Centers • Helicopter Tours • Gifts & Souvenir s • VolcanoCam • Restaurants • Recreation • Hiking / Climbing • Lodging / Motels • Camping / RV Parks • Fuel & Supplies • Maps • Satellite Map • 360° Crater View • Photography • V ideos • Community • Real Estate • Students • Links 67 reviews. Over 230 square miles of … Over the last 500 years, Mount St. Helens has … Mount St. Helens National Volcanic Monument is located on the Gifford Pinchot National Forest in Southwest Washington. During the 1980 eruption the upper 400 m (1,300 ft) of the summit was removed by a huge debris avalanche, leaving a 2 x 3.5 km (1.2 x 2.2 mi) horseshoe-shaped crater now partially filled by a lava dome and a glacier. Mount St. Helens, located in southwestern Washington about 50 miles northeast of Portland, Oregon, is one of several lofty volcanic peaks that dominate the Cascade Range of the Pacific Northwest; the range extends from Mount Garibaldi in British Columbia, Canada, to Lassen Peak in northern California. Mt. St. Helens:. Popular: Booked by 365 travelers! Located in a beautiful building that has an impressive view of Mt St Helens off in the distance. The Science Learning Center, operated by the Mount St. Helens Institute is at milepost 43. The current summit elevation of Mount St. Helens, located in Gifford Pinchot National Forest in Washington, is now approximately 8,300 feet. The Forest Learning Center, operated by Weyerhaeuser is located at milepost 37. The Mount St. Helens Visitor Center at Silver Lake is one of several Interpretive Centers located on the Spirit Lake Highway with information about the volcano. ... During covid there were port-o-pots at the observatory location. There are timelines with, in some cases second by second explanations of what happened during this eruption and also a movie of the eruption and devastation. Best known as the site of the historic 1980 volcanic eruption, the Monument offers a variety of recreation opportunities, including the chance to climb to the summit of the most active volcano in the Cascade Range. Mt. Mount St. Helens resides within the Cascade Mountain range, which was formed by a subduction plate boundary. Quick View. 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