If you can stay longer, climb Cinder Cone, an outstanding example of the results of volcanism, and, if you have the stamina for a more demanding trek, try Lassen Peak. Four types of volcanoes ...

Ash released from shield volcanoes often builds up around the vent forming a steep, round hill known as a cinder cone. A lava tube may also form, beneath the surface of the ground, when low ...

A violent explosion radically altered the landscape, sending ash and lava across the surrounding area and covering about 800 square miles with volcanic debris. The resulting cinder cone stands ...