
Greenhorn stands at the center of this high-elevation mountain landscape, where the boundaries of the Umatilla National Forest, Whitman National Forest, and Malheur National Forest converge. The area is defined by its deep mining history, evidenced by an extensive network of claims and workings including the Bonanza Mine, Humboldt Mine, and Red Bird Mine. Traces of earlier extractive industries are everywhere, from the Dredge Tailings along Orofino Creek to the Old Railroad Grade winding through the southern terrain near Tipton.
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2 editions found
1901 · Sumpter
USGS Topo · 1:125,000
1951 · Bates
USGS Topo · 1:62,500
1951 · Desolation Butte
USGS Topo · 1:62,500
1955 · Canyon City
USGS Topo · 1:250,000
1959 · Canyon City
USGS Topo · 1:250,000
1961 · Whitney
USGS Topo · 1:24,000
1972 · Austin
USGS Topo · 1:24,000
1972 · Mt. Ireland
USGS Topo · 1:24,000
1972 · Granite
USGS Topo · 1:24,000
1972 · Greenhorn
USGS Topo · 1:24,000