Culture65 years before St. Helens blew, another Cascade volcano shocked the Pacific NorthwestBy Kami Horton (OPB)May 22, 2025 1 p.m.Mount Lassen, in the southern Cascades, erupted on May 22, 1915.📨 Daily news in your inboxSign up today for OPB’s “First Look” – your daily guide to the most important news and culture stories from around the Northwest.EmailPlease leave this field blankSign up