
Mount St Helens National Volcanic Monument defines the southern portion of this post-eruption landscape, documenting the dramatic changes following the 1980 volcanic event. The map provides a critical geographic record of the region, featuring the North Fork Toutle River Pre-Eruption Channel, an essential detail for understanding how the debris flow altered the local drainage. To the north, the terrain transitions into the Gifford Pinchot National Forest, where a network of lakes including Tradedollar Lake, Lonesome Lake, and Venus Lake remain scattered among peaks like Black Mountain. High-elevation landmarks such as Mount Margaret and Mount Whittier overlook the recently formed Coldwater Lake and the iconic Spirit Lake. The presence of several Borrow Pits and a Quarry near the Cowlitz and Skamania county line reflects the human activity and recovery efforts in this evolving wilderness.
35 named features on this map. Tap any name to fly to it.
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2 editions found
1919 · Mount St Helens
USGS Topo · 1:125,000
1953 · Hoquiam
USGS Topo · 1:250,000
1953 · Cougar
USGS Topo · 1:62,500
1953 · Elk Rock
USGS Topo · 1:62,500
1957 · Hoquiam
USGS Topo · 1:250,000
1957 · Spirit Lake
USGS Topo · 1:62,500
1958 · Mt St. Helens
USGS Topo · 1:62,500
1958 · Hoquiam
USGS Topo · 1:250,000
1962 · Hoquiam
USGS Topo · 1:250,000
1975 · Mt. St. Helens NE
USGS Topo · 1:24,000