Eagle Lake is a lake at 5,098 ft (1,554 m) elevation in Lassen County approximately 15 mi (24 km) north of Susanville, California. An endorheic alkaline lake, it is the second largest natural lake entirely in the state of California.
Cinder Cone, a 215 m (700 ft) tall volcanic cone located in the northern part of Lassen Volcanic National Park, is the youngest mafic volcano in the Lassen region and the second youngest eruption in the Twin Lakes sequence.