Thursday, July 9, 2026

Question: Rising over far Northern California, Mount Shasta is the most voluminous volcano in the Cascade Range. What type of mountain is it?

Answer: A stratovolcano, the steep-sided, cone-shaped kind built from layered lava and ash. Mount Shasta is the most voluminous volcano in the Cascade Range, sits in Siskiyou County, and is still considered potentially active. Its last eruption occurred about 3,200 years ago, and the USGS rates its threat potential as “Very High.”