
The North Fork John Day River and the Middle Fork John Day River converge in this high-altitude landscape within the Umatilla National Forest. The 1990s terrain is defined by dramatic elevation changes between the river canyons and peaks such as Murphy Mountain, Slickear Mountain, and Conger Mountain. Evidence of land management and backcountry access is visible through numerous 4WD tracks and forest roads that navigate between strategic points like Fourmile Gap and Twomile Gap. Multiple drainage systems, including Potamus Creek, Mallory Creek, and Ditch Creek, carve deep canyons through the basaltic landscape, highlighting the complex hydrology that feeds the John Day basin. This survey captures the remote character of the Morrow and Grant County border, where several stock ponds and springs suggest a history of seasonal grazing and water resource management in a semi-arid forest environment.
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This is the sole edition of this map. No revisions or reprints were ever made.
1950 · Ritter
USGS Topo · 1:62,500
1951 · Monument
USGS Topo · 1:62,500
1952 · Ritter
USGS Topo · 1:62,500
1953 · Pendleton
USGS Topo · 1:250,000
1955 · Canyon City
USGS Topo · 1:250,000
1956 · Pendleton
USGS Topo · 1:250,000
1959 · Canyon City
USGS Topo · 1:250,000
1969 · Lake Penland
USGS Topo · 1:24,000
1969 · Thompson Flat
USGS Topo · 1:24,000
1969 · Madison Butte
USGS Topo · 1:24,000