The southernmost of the Cascade Range volcanoes Lassen Peak is one of the world's largest plug domes. Lassen Peak last erupted from 1914 to 1917, making it the most recent volcano to erupt in the coterminous United States prior to the 1980 to 1986 eruptions of Mount St. Helens.
CLICK on the colored links above to go to those Web Pages.
LCC Lassen Volcanic N.P. Lassen Peak Image #1 08-09-04 Image by David Cordero dcordero@lcc.ctc.edu