Hardy sits at a strategic bend in the Missouri River, where the canyon walls tighten near DeLacey Point and Chisholm Mtn. This landscape is defined by the river’s passage through several hazardous stretches, including Pine Island Rapids and Lone Pine Rapids, which historically influenced navigation and engineering. The transport corridor along the water is well-documented, showing the path of Old US-91 and the engineering of Tunnel Number 1, reflecting the region's reliance on river-level passes through the mountains of Cascade County.
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This is the sole edition of this map. No revisions or reprints were ever made.
1886 · Great Falls
USGS Topo · 1:250,000
1949 · Cascade
USGS Topo · 1:62,500
1951 · Cascade
USGS Topo · 1:62,500
1954 · Great Falls
USGS Topo · 1:250,000
1957 · Great Falls
USGS Topo · 1:250,000
1960 · Simms
USGS Topo · 1:62,500
1961 · Craig
USGS Topo · 1:24,000
1961 · Hardy
USGS Topo · 1:24,000
1961 · Hound Creek Reservoir
USGS Topo · 1:24,000
1961 · Rocky Reef
USGS Topo · 1:24,000