Lassen Volcanic National Park is located in the Cascade Range, in Shasta, Lassen, Plumas, and Tehama counties, in the state of California, United States. The park contains the 3,187 m (10,457 ft) Lassen Peak, an active volcano and the largest plug dome volcano in the world.
As stated in the foundation document:
Lassen Volcanic National Park preserves dynamic volcanic phenomena, scenic values, outstanding wilderness character, and diverse natural and cultural resources; and provides educational, recreational, and exceptional scientific opportunities for the benefit of the public.