
Holland and Bridgeview anchor the southern reaches of this landscape in the Illinois Valley, where the East Fork Illinois River and its numerous tributaries descend through the Siskiyou Mountains. The drainage network is particularly dense here, with Sucker Creek, Kelly Creek, and McMullin Creek carving out distinct drainages and gulches such as Peterson Gulch and Green Gulch. This 2011 survey documents a mix of rural ranching and aviation, notably the Villair Ranch and the B Bar Ranch Airport in the north.
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1908 · Grants Pass
USGS Topo · 1:125,000
1917 · Kerby
USGS Topo · 1:125,000
1918 · Kerby
USGS Topo · 1:125,000
1945 · Kerby
USGS Topo · 1:125,000
1954 · Cave Junction
USGS Topo · 1:62,500
1954 · Oregon Caves
USGS Topo · 1:62,500
1954 · Selma
USGS Topo · 1:62,500
1954 · Grants Pass
USGS Topo · 1:62,500
1955 · Medford
USGS Topo · 1:250,000
1957 · Medford
USGS Topo · 1:250,000