
The Malheur National Forest dominates this section of Harney County, Oregon, where the headwaters of the Silvies River and Poison Cr cut through high plateau terrain. This landscape is defined by its numerous isolated water sources, including Bob Bennett Spring, Rimrock Spring, and Peabody Spring, which provided essential stopping points for livestock and travelers in an arid high-desert environment. The namesake Mosquito Flat sits in the southwest corner, while the eastern edge is marked by dramatic elevation changes in Heifer Canyon and Devine Canyon. Forestry and grazing infrastructure are evidenced by an extensive network of service roads, including Lost Creek Rd and Gravel Ridge Way, which navigate between prominent landforms like Mahogany Ridge and Gravel Ridge.
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This is the sole edition of this map. No revisions or reprints were ever made.
1955 · Burns
USGS Topo · 1:250,000
1958 · Burns
USGS Topo · 1:250,000
1959 · Burns
USGS Topo · 1:250,000
1959 · West Myrtle Butte
USGS Topo · 1:62,500
1959 · Harney
USGS Topo · 1:62,500
1960 · Burns
USGS Topo · 1:62,500
1961 · Calamity Butte
USGS Topo · 1:62,500
1978 · Stinkingwater Mountains
USGS Topo · 1:100,000
1990 · Poison Creek
USGS Topo · 1:24,000
1990 · Burns NW
USGS Topo · 1:24,000