This explosion was the most powerful in a 1914-17 series of eruptions at Lassen Peak.

The area near Lassen Peak became a haven for new settlers throughout the 1800s.

Today the most active volcano in the area is Lassen Peak.

Among the vents built by this activity include Lassen Peak.

Lassen Peak has the highest known winter snowfall amounts in California.

Lassen Peak reached its present height in a relatively short time, probably in just a few years.

The most recent eruptive period of Lassen Peak began in 1914, and lasted for about seven years (see below).

Still considered potentially active, Lassen Peak last erupted in 1914 and 1915.

Finally, after two and a half hours of driving, we approached the trail head to Lassen Peak.

Lassen Peak is situated at a center from which many of these glaciers originated.