USGS HOME
Contact USGS

  • About
  • Observatories
  • Activity
  • Education
  • Publications

Lassen Volcanic National Park

In August of 1916, Lassen Volcanic National Park was established. The park and Lassen Peak take their name from Peter Lassen, one of the first white settlers in the northern Sacramento Valley, who discovered of a route through the mountains called the Lassen Trail.

All four types of volcanoes found in the entire world are represented in Lassen Volcanic National Park— shield (Prospect Peak), plug dome (Lassen Peak), Cinder Cone (Cinder Cone), and Composite (Brokeoff Volcano) volcanoes. Additionally, Lassen's hydrothermal features include boiling mudpots, steaming ground, roaring fumaroles, and sulfurous gases - all visible either by car or via a short walk.

To see these volcanic sites, Lassen Volcanic National Park offers both summer and winter weather activities. With over 150 miles of hiking trails, both day hiking and backpacking are popular summer activities. Winter conditions often begin as early as October and persist through June or July making snow play, snowshoeing, and backcountry skiing great options for cold months.

For more information, visit the Lassen Volcanic National Park website.