The major volcanoes within the arc include Mount Silverthrone, Mount Meager, Mount Cayley, Mount Garibaldi, Mount Baker, Glacier Peak, Mount Rainier, Mount St. Helens, Mount Adams, Mount Hood, Mount Jefferson, Three Sisters, Broken Top, Mount Bachelor, Newberry Volcano, Mount Thielsen, Mount Mazama (Crater Lake), Mount McLoughlin, Medicine Lake Volcano, Mount Shasta, Shastina,Mount Tehama and Lassen Peak.