Lassen Volcanic National Park is an American national park in northeastern California. The dominant feature of the park is Lassen Peak, the largest plug dome volcano in the world and the southernmost volcano in the Cascade Range. Lassen Volcanic National Park is one of the few areas in the world where all four types of volcanoes can be found: plug dome, shield, cinder cone, and stratovolcano.

The 2021 Dixie Fire was an enormous wildfire in Butte, Plumas, Lassen, Shasta, and Tehama counties in Northern California. Named after a nearby Dixie Road, the fire began in the Feather River Canyon near Cresta Dam in Butte County on July 13, 2021, and burned 963,309 acres (389,837 ha) before it was declared 100 percent contained on October 25, 2021. It was the largest single source wildfire in recorded California history, and the second-largest wildfire overall, The fire damaged or destroyed several communities, including Greenville on August 4, Canyondam on August 5, and Warner Valley on August 12.