
The Mad River and Van Duzen River headwaters converge in this 1918 Corps of Engineers tactical survey of Trinity County. The landscape is defined by the early administrative presence of the Forest Service, as indicated by a network of ranger stations including Mad River R.S., Scott R.S., and Willow Spring R.S.. This era represents the transition from early frontier settlement to federal forest management, centered around the small community of Ruth. High mountain peaks such as Pickett Peak and Grizzly Mountain dominate the skyline, while the Humboldt Base Line provides a primary surveying datum through the center of the sheet. The drainage patterns of Rattlesnake Creek and Forest Glen Creek illustrate the complex hydraulic geography of the Trinity River system, providing critical details for those researching early 20th-century California mountain life and timber infrastructure.
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This is the sole edition of this map. No revisions or reprints were ever made.
1909 · Big Bar
USGS Topo · 1:96,000
1914 · Pilot Creek
USGS Topo · 1:62,500
1915 · Big Bar and Vicinity
USGS Topo · 1:250,000
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