Lassen Volcanic National Park, located in northeastern California, is part of the National Park Service, within the Department of the Interior. The over 100,000- acre park is situated 130 miles north of Sacramento at the southern end of the Cascade Mountain Range. Established in 1916, Lassen Volcanic is the fifteenth national park established by Congress, making it one of the oldest in the nation. Come see the steaming fumaroles, meadows freckled with wildflowers, clear mountain lakes, and numerous volcanoes. Lassen Volcanic offers opportunities to discover the wonder and mysteries of volcanoes for visitors willing to explore the undiscovered. At Lassen snow arrives early and stays late. Jagged features are made smooth by deep blankets of snow, yet far below the surface, a fire still burns. Eroded volcanic remnants, U-shaped valleys, and roaring steam vents illustrate Earth’s endless cycle of creation and destruction. Woven into this dramatic landscape are timeless stories of survival, renewal, and discovery. The summer season (July through September) is short, but affords to greatest access and selection of activities. The park is usually snow-covered in the winter months; road access is limited and nearly all activities involve snow. Learn about visiting in each season.