
Black Rock sits as a lonely outlier of settlement in the northeastern corner of this 2017 survey, serving as a gateway to the dense, high-elevation terrain of the Oregon Coast Range. The topography is defined by the headwaters of several major drainages, most notably the Little Luckiamute River and the S Fork Siletz River, which carve deep paths through the timberlands. Key ridges such as Fanno Ridge and Cougar Ridge provide the structural framework for the landscape, while peaks like Bald Mtn and Green Mtn rise above the surrounding slopes. The network of forest roads, including Valsetz Rd and Black Rock Rd, follows the difficult contours of the land, hinting at the area's legacy of commercial timber harvest and the rugged transit required to navigate these drainages.
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1921 · Corvallis
USGS Topo · 1:62,500
1939 · Marys Peak
USGS Topo · 1:62,500
1942 · Marys Peak
USGS Topo · 1:62,500
1942 · Corvallis
USGS Topo · 1:62,500
1942 · Valsetz
USGS Topo · 1:62,500
1942 · Dallas
USGS Topo · 1:62,500
1953 · Salem
USGS Topo · 1:250,000
1954 · Salem
USGS Topo · 1:250,000
1956 · Corvallis
USGS Topo · 1:62,500
1956 · Valsetz
USGS Topo · 1:62,500