Mount St. Helens, an active volcano located in the Cascade Range of the Pacific Northwest, erupted on Sunday, May 18, 1980, killing 57 people, destroying 250 homes, and burying roads. Volcanic mudflow, called “lahar,” destroyed acres of mountain vegetation, including Weyerhaeuser’s Mount St. Helens Tree Farm. The downed trees had to be salvaged quickly to avoid damage from insects and the environment. Photographer Frank Gohlke first visited Mount St. Helens in the summer of 1981. He has documented the changing landscape with his large format view camera over the course of several years.