Mount Wrangell is the only volcano in the Wrangell Mountains that is currently active. During the winter and on cool summer mornings, it is not unusual to see a steam plume rising out of the vents situated in craters along the margin of the summit caldera. In spite of frequent puffs of steam, geologists tell us that Wrangell is showing no signs of erupting any time soon. But those steam vents remind visitors that there is still heat below and that this massive volcano is still active.