On June 14, 1914, three men climbed Lassen Peak to see why a seemingly dormant volcano had started rumbling 16 days before. Now, peering into a newborn crater, they felt the ground tremble.

The highlight of the park is Lassen Peak, the largest plug dome volcano in the world and the southernmost volcano in the ...

Lassen offers sweeping grandeur and hydrothermal marvels in an uncrowded, contemplative atmosphere. The park is home to more than 40 volcanoes, bubbling mudpots, steaming fumaroles, stunning mountain ...