Lava Flows

Eruption History for Mount Mazama and Crater Lake Caldera

Since the climactic eruption of Mount Mazama, “postcaldera volcanism,” has been confined within the caldera.

The long history of volcanism at Mount Mazama, the volcano that houses Crater Lake, suggests that this volcanic center will be active in the future. Future eruptions will likely occur within the caldera and probably beneath the water's surface.

Mount Mazama is one of the major volcanoes of the Cascades Arc.