Geyserville and the surrounding Alexander Valley vineyards anchor this Sonoma County survey, following the corridor where the Russian River and the Northwestern Pacific RR run parallel. The landscape is a mix of alluvial plains and rising peaks like Bradford Mtn, with many smaller communities such as Chianti, Omus, and Nervo linked by historical routes like Asti Rd and Geyserville Ave. Local heritage is preserved in sites like the Olive Hill Cemetery and the Long Ranch Family Cemetery, while the presence of the Healdsburg Municipal Airport at the southern edge marks a shift toward modern infrastructure.
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1920 · Healdsburg
USGS Topo · 1:62,500
1921 · Skaggs
USGS Topo · 1:62,500
1921 · Kelseyville
USGS Topo · 1:62,500
1933 · Healdsburg
USGS Topo · 1:48,000
1938 · Hopland
USGS Topo · 1:62,500
1940 · Healdsburg
USGS Topo · 1:62,500
1943 · Cazadero
USGS Topo · 1:24,000
1943 · Skaggs Springs
USGS Topo · 1:24,000
1943 · Kelseyville
USGS Topo · 1:62,500
1943 · Hopland
USGS Topo · 1:62,500