A dormant plug dome, Lassen Peak is the main focus of Lassen Volcanic National Park, but this 165-square-mile tract of dense forests and alpine meadows also abounds with memorable opportunities for hiking, camping, and wildlife photography. The famed peak began erupting in May 1914, sending pumice, rock, and snow thundering down the mountain, and gas and hot ash billowing into the atmosphere. Lassen's most spectacular outburst was in 1915, when it blew a cloud of ash almost 6 miles high. The resulting mudflow destroyed vegetation for miles; the evidence is still visible today, especially in Devastated Area. The volcano… Read More
finally came to rest in 1921.