Lassen Peak is a composite volcano.
Lassen Volcanic National Park (U.S. National Park Service)
The park's 160,000 acres--150 square miles--contain spectacular mountain lakes, creeks, elevations ranging from 5,300 to over 10,000 feet, and many trails. The park contains a wide variety of nearly every volcanic known feature. The centerpiece of the park is the 10,457 foot volcano, known as Lassen Peak, and seen from Manzanita Lake above. The stone entrance sign in the southwest area of the park is known as the Raker Memorial, which was built in 1931.
Webcams - Lassen Volcanic National Park (U.S
Another volcanic feature, not directly related to Lassen Peak, is in the northeast corner of the park. The Fantastic Lava Beds are basalt lava flows that came from Cinder Cone, a cinder cone volcano on the western edge of the flows. The flows dammed creeks, creating Snag Lake, the large lake to the south of the Fantastic Lava Beds, and Butte Lake to the north. The lakes appear black in contrast to the lava flows.