Mount St. Helens Forest Recovery: Natural Regrowth, Gophers, and Lessons for Reforestation

The 1980 eruption of Mount St. Helens flattened forests across hundreds of square miles, but the recovery since then is one of the best studied examples of how woodlands return after a major disturbance. Snow-covered firs and mountain hemlocks survived the blast and later reseeded the area. Lupines fixed nitrogen in the bare pumice, and pocket gophers brought buried soil and fungi back to the surface. Much of the regrowth happened without any planting at all. Outside the volcanic monument, Weyerhaeuser planted about 18 million trees after salvaging timber, which created more uniform conifer stands. Naturally recovering areas look different, with more open ground and shrubs. Elk browsing still slows tree recovery in parts of the Pumice Plain, so regrowth remains uneven more than 40 years later. For anyone working on reforestation, carbon sequestration, or post-disturbance land management, this case shows where natural recovery can do the work and where intervention is still needed.