Glacier Peak, Active stratovolcano in Snohomish County, Washington, US.

Glacier Peak is a stratovolcano in Snohomish County, Washington, rising to 3,213 meters (10,541 feet) with twelve glaciers covering its slopes. Several false summits lead to the main peak, which is built from dacite and remains largely wrapped in snow.

Naturalist George Gibbs learned from Native Americans in 1850 about smoking activity at this mountain north of Mount Rainier. Later investigations revealed that the area has remained volcanically active for thousands of years.

The Sauk-Suiattle name Dakobed, or Tda-ko-buh-ba in the Lushootseed dialect, is still used for the mountain. Native peoples of the region counted it among the volcanoes they treated as spirit beings in their stories. In 1850 they told naturalist George Gibbs the peak had once "smoked".

Access to the trails requires backcountry permits and careful preparation, as the region lies very far from roads. From July to September, snow thins in some sections, but most routes remain demanding and require solid mountain experience.

Ash from Glacier Peak's eruptions travelled far beyond Washington: layers near Chelan are about 30 cm thick, while at Missoula, Montana, they measure 7.6 mm. Lahars from the eruptions of about 5,900 and 1,800 years ago reached Puget Sound. The false summit beside the main peak is named Disappointment Peak.