Nestled in the Wrangell Mountains of Alaska, Mount Drum is a steep-sided stratovolcano with a complex geologic history. Unlike the broad, flat-topped profile of nearby Mount Wrangell, Mount Drum displays a classic conical form shaped by explosive eruptions and long-term erosion. The cone is built from layered deposits of volcanic ash, lava flows, and fragmented rock.

Geologists believe Mount Drum began forming millions of years ago, with multiple phases of volcanic activity contributing to its present shape. Rising to more than 12,000 feet, the mountain has significant local relief. Its south face climbs roughly 6,000 feet above the Nadina Glacier over a relatively short horizontal distance, creating one of the more dramatic escarpments in the range.

Mount Drum is currently considered dormant, with no confirmed eruptions in recent history. However, volcanic features such as fumaroles and geothermal vents on its flanks indicate that heat remains within the system. These features suggest lingering geothermal activity, even though the volcano shows no signs of imminent eruption.

Due to its remote location and technical climbing conditions, Mount Drum is less frequently visited than other major Alaskan peaks. For those who reach it, the mountain offers a clear view of the geologic forces that shaped the Wrangell Mountains and continue to influence Alaska’s landscape.