
Continental Divide crests through this high-altitude landscape in the Helena National Forest, defining the drainage patterns of the eastern and western slopes. The Continental Divide Trail winds across the ridgeline, passing the prominent Granite Butte Lookout atop Granite Butte. This area is characterized by deep drainages and steep ridges like Cayuse Ridge, where numerous mining sites are noted simply as Prospects or Mines, particularly near South Fork Poorman Creek. In the lower elevations, the Queen of the Rosary Ch stands near the confluence of South Fork and Little Prickly Pear Creek, serving as a rare community landmark in a terrain otherwise defined by its hydrology and industrial exploration.
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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