The Eel River defines the western corridor of this landscape, where the settlement of Alderpoint sits at the river's edge along Alderpoint Rd. This 2015 study by the U.S. Geological Survey shows a remote region of the North Coast Ranges, where the boundary between Humboldt Co and Trinity Co cuts through steep, forested terrain. To the north, the protected acreage of the Six Rivers National Forest borders the ridges, while various watercourses like Dobbyn Cr and Mill Cr carve deep drainages through the territory.
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This is the sole edition of this map. No revisions or reprints were ever made.
1918 · Anada
USGS Topo · 1:62,500
1920 · Harris
USGS Topo · 1:62,500
1921 · Hoaglin
USGS Topo · 1:62,500
1922 · Island Mountain
USGS Topo · 1:62,500
1931 · Hoaglin
USGS Topo · 1:96,000
1935 · Hoaglin
USGS Topo · 1:125,000
1949 · Blocksburg
USGS Topo · 1:62,500
1949 · Alderpoint
USGS Topo · 1:62,500
1951 · Alderpoint
USGS Topo · 1:62,500
1951 · Blocksburg
USGS Topo · 1:62,500