Salmon National Forest defines this high-elevation landscape in Lemhi County, where the sharp ridgeline of the Lemhi Range divides complex drainage systems. The survey illustrates the difficult terrain near the southern edge of the forest, including the prominent summits of Poison Peak and Watson Peak. Water sources are critical identifiers in this environment, from seasonal drainages like Twelvemile Cr and McDevitt Cr to localized points such as Andrews Spring and the Bull Summit Waterhole.
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This is the sole edition of this map. No revisions or reprints were ever made.
1950 · Salmon
USGS Topo · 1:62,500
1951 · Salmon
USGS Topo · 1:62,500
1955 · Dubois
USGS Topo · 1:250,000
1955 · Dillon
USGS Topo · 1:250,000
1956 · Goldstone Mtn
USGS Topo · 1:62,500
1956 · Lemhi
USGS Topo · 1:62,500
1957 · Dillon
USGS Topo · 1:250,000
1958 · Dubois
USGS Topo · 1:250,000
1958 · Dillon
USGS Topo · 1:250,000
1962 · Dillon
USGS Topo · 1:250,000