Glacier Peak in north-central Washington state is not prominently visible from any major metropolitan centers, and so its attractions, as well as its hazards, tend to be overlooked. Yet, Glacier Peak has produced larger and more explosive eruptions than any other Washington volcano except Mount St. Helens. In the past 14,000 years, Glacier Peak has erupted at least a dozen times, most recently around the eighteenth century. The probability and hazards of a future eruption is discussed. Includes map of thickness of ash erupted from Glacier Peak's largest ash eruption about 13,000 years ago and map of areas inundated by debris flows from Glacier Peak eruptions. This is USGS Open-File Report 95-413. Educational levels: High school, Middle scho...