
The high Bitterroot Divide along the Montana-Idaho border is the central focus of this 1965 survey. At the crest sits Hoodoo Pass, a high-altitude crossing point where the Hoodoo Pack Trail transitions between the Lolo National Forest to the northeast and the Clearwater National Forest to the southwest. The rugged geography is defined by steep drainages feeding the North Fork Clearwater River, which winds through the southwestern corner of the sheet. Notable high points like Trap Point and Short Point overlook deep canyons carved by Rawhide Creek and Long Creek. Evidence of early communication infrastructure is found near the pass at the Radio Tower, while the name Vanderbilt Gulch suggests the influence of early mining or timber prospecting in this isolated mountain landscape.
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1911 · Lolo
USGS Topo · 1:250,000
1913 · Lolo
USGS Topo · 1:250,000
1918 · St Regis
USGS Topo · 1:125,000
1919 · St. Regis
USGS Topo · 1:125,000
1956 · Wallace
USGS Topo · 1:250,000
1956 · Hamilton
USGS Topo · 1:250,000
1957 · Illinois Peak
USGS Topo · 1:62,500
1959 · Hamilton
USGS Topo · 1:250,000
1960 · Wallace
USGS Topo · 1:250,000
1960 · Hamilton
USGS Topo · 1:250,000