Lassen Volcanic National Park protects a fascinating volcanic landscape featuring all four types of volcanoes, steaming fumaroles, boiling mud pots, and the largest plug dome volcano in the world, Lassen Peak. Located in northeastern California, the park offers diverse ecosystems from lush forests to alpine meadows, with over 150 miles of hiking trails. Visitors can explore hydrothermal areas like Bumpass Hell, scenic mountain lakes, and panoramic vistas of volcanic peaks and surrounding wilderness. The park is a year-round destination with summer hiking and winter snowshoeing opportunities.