Gifford Pinchot National Forest defines this high-elevation landscape in the Cascades along the Clark and Skamania county line. The terrain is marked by a series of prominent summits used for fire detection, including Siouxon Peak Lookout atop Siouxon Peak and Huffman Peak Lookout at Huffman Peak. These peaks are connected by a network of Forest Service infrastructure, such as Calamity Peak Rd and Nat For Dev Rd 315. Drainage systems like Siouxon Cr and Canyon Cr carve through the ridges, while the presence of Hickmans Cabin near Horseshoe Ridge points to the area's history of forest management and early backcountry habitation. The map illustrates a region dedicated to conservation and forestry, with numerous creeks such as Wildcat Cr and Big Rock Cr feeding the larger watershed.
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This is the sole edition of this map. No revisions or reprints were ever made.
1919 · Mount St Helens
USGS Topo · 1:125,000
1940 · Lookout Mtn
USGS Topo · 1:62,500
1941 · Yacolt
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
1953 · Lookout Mtn
USGS Topo · 1:62,500
1953 · Cougar
USGS Topo · 1:62,500
1956 · Yacolt
USGS Topo · 1:62,500