The Kalama River dominates this portion of Cowlitz County, serving as the central drainage for a series of high peaks and timbered ridges in southwest Washington. By the early 21st century, the river's ecological importance is highlighted by the presence of the Kalama Falls Salmon Hatchery and the natural barrier of Lower Kalama River Falls. The drainage network is complex, with Woolford Creek, Summers Creek, and Little Kalama River cutting through the mountainous terrain.
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1921 · Kalama
USGS Topo · 1:62,500
1922 · St. Helens
USGS Topo · 1:62,500
1940 · La Center
USGS Topo · 1:62,500
1941 · St Helens
USGS Topo · 1:62,500
1943 · Pigeon Springs
USGS Topo · 1:62,500
1943 · St Helens
USGS Topo · 1:62,500
1948 · Vancouver
USGS Topo · 1:250,000
1950 · Vancouver
USGS Topo · 1:250,000
1950 · Vancouver
USGS Topo · 1:250,000
1953 · Hoquiam
USGS Topo · 1:250,000