Data for Mount Saint Helens is somewhat ambivalent. The topography available online from the U.S. Geological Survey dates from 1981 and shows changes due to the eruption. But all the other data layers - hydrography, roads, and so, date from 1978! Thus the data show the pre-eruption glaciers, outline of Spirit Lake, and the now-buried course of old state highway 504. On the maps above, the buried highway is dark purple, new lakes are light blue and the debris flow is light brown. Post-eruption data from U.S. Forest Service maps.
|Heading east on U.S. 12. From Johnston Ridge to Windy Ridge is 5 miles straight line, over 100 miles and three hours by road.|
|Left and below: the spectacular glacial valley of Clearwater Creek.|
|Mount Saint Helens hidden by the clouds.|
|New growth since 1980.|
|Clearwater Creek valley and the edge of the blast area.|
|Two miners were killed here during the 1980 eruption. Their car was flung across the road.|
|Left and below: views east from the ridge.|
|Spirit Lake and Harmony Basin|
|Looking east toward Mount Adams|
|Old pumice layers near Windy Ridge.|
Windy Ridge parking area.
Below: Spirit Lake from the viewpoint.
|Mount Saint Helens|
|Mount Adams peeping through the clouds.|
|Sharp edge of the blast zone.|
Created 14 July 2003, Last Update 01 July 2012
Not an official UW Green Bay site