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Lassen Peak

Volcanic Centerpiece of Lassen National Park

Stratovolcano on Lassen Peak Trail in Lassen Volcanic NP, Cascade Range near Viola, CA

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Lassen Peak, commonly referred to as Mount Lassen, is the southernmost active volcano in the Cascade Range, United States. Located in the Shasta Cascade region of Northern California, Lassen stands 3,500 ft (1,100 m) above the surrounding terrain and has a volume of 0.5 cu mi (2 km3), making it one of the largest lava domes on Earth. It arose on the destroyed northeastern flank of now-gone Mount Tehama, a stratovolcano at least 1,000 ft (300 m) higher than Lassen Peak. It is part of the Cascade Volcanic Arc, which stretches from southwestern British Columbia to northern California. On May 22, 1915, a powerful explosive eruption at Lassen Peak devastated nearby areas, and spread volcanic ash as far as 200 mi (300 km) to the east. This explosion was the most powerful in a series of eruptions…