
Mount St. Helens before eruption, US Forest Service, Gifford Pinchot National Forest historic photo.

A group of young hikers at the Spirit Lake Ranger Station in the Gifford Pinchot National Forest in 1950 - US Forest Service photo.

Spirit Lake Ranger Station before the eruption in 1980 - US Forest Service photo.

Gifford Pinchot Spirit Lake Campground, before the 1980 eruption - US Forest Service photo.

Spirit Lake beach and dock, 1978 - US Forest Service photo.

Mt St Helens and Spirit Lake from Mt Margaret, pre-eruption, Photo #350, US Forest Service, Gifford Pinchot National Forest.

Pre-eruption Spirit Lake, Mt St Helens, Photo #136, US Forest Service, Gifford Pinchot National Forest.

Fishermen on Spirit Lake before the eruption, 1970s - US Forest Service photo.

Sailing on Spirit Lake before the eruption, 1970s - US Forest Service photo.

Mount St. Helens one year prior to the May 18, 1980, catastrophic eruption, showing glaciers at the summit - USGS photo.

Mount St. Helens had a conical peak until the May 18 eruption left behind a horseshoe-shaped crater. Spring, 1980. Courtesy of Peggy Short-Nottage, via The Statesman Journal.

On March 20, 1980, after a quiet period of 123 years, earthquake activity once again began under Mount St. Helens volcano. Seven days later, on March 27, small phreatic (steam) explosions began, like the one shown here from April 10, 1980. USGS.

After Mount St. Helens started erupting in March, 1980, the Washington State patrol was tasked with putting up road blocks to restricted areas - US Forest Service photo.

Mount St. Helens prior to eruption, March 24, 1980, Photo #056 - US Forest Service, Gifford Pinchot National Forest.

In April 1980 a crack opens up on Mt. Saint Helens sending up ash, Photo #25, US Forest Service, Gifford Pinchot National Forest.

Spirit Lake before the big May 18, 1980, eruption of Mount St. Helens. View from the south. Mount Rainier, is in the distance. April 1980. Photo: Peter Lipman, USGS.

Volcano Ash sign from business in Cowlitz County, from April, 1980, when tourists flooded the area to get a look at Mount St. Helens - Gifford Pinchot National Forest historical photo

Steam-blast eruption from summit crater of Mount St. Helens. Aerial view, April 6, 1980, looking southwest, showing a roiling, gray-brown, ash-laden cloud that envelops and almost completely hides an initial fingerlike ash column. USGS.

Measuring tilt in Timberline parking lot in early April 1980 during lightly falling snow. Photo: Don Swanson, USGS.

Steaming Mount St. Helens as seen from Interstate 5, at Chehelis, Washington. April 12, 1980. Photo: Lyn Topinka, USGS.

Harry Truman - the curmudgeon who refused to leave his homestead when St. Helens was on the brink of eruption. Harry’s Ridge, a trail in the Mount St. Helens Volcanic Monument, is named for him. US Forest Service photo.

Harry Truman's Spirit Lake Lodge, before the 1980 eruption - US Forest Service photo.

David Johnston at Coldwater II, 1900 hours, May 17, 1980. Dave did not survive the next day's eruption. Coldwater II would eventually be re-named "Johnston Ridge" in honor of Dave. Photo: Harry Glicken, USGS.