
Helena National Forest spans the dramatic heights of the Continental Divide, where the border between Lewis and Clark and Powell counties follows the crest of the range. This landscape is defined by the headwaters of numerous vital drainages, including Nevada Creek flowing west and the South Fork Little Prickly Pear Cr descending the eastern slopes. The 2001 revision illustrates the complex topography surrounding Nevada Mountain, a prominent peak that anchors the central portion of the quadrangle.
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This is the sole edition of this map. No revisions or reprints were ever made.
1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1899 · Helena
USGS Topo · 1:250,000
1903 · Helena
USGS Topo · 1:250,000
1947 · Butte
USGS Topo · 1:250,000
1958 · Butte
USGS Topo · 1:250,000
1958 · Avon
USGS Topo · 1:62,500
1959 · Elliston
USGS Topo · 1:62,500
1960 · Butte
USGS Topo · 1:250,000
1962 · Butte
USGS Topo · 1:250,000