
Boulder serves as the focal point for this mid-1990s survey, where the Boulder River School & Hospital and a local Cemetery sit just north of the Boulder River. The landscape transitions from the developed Boulder Valley into the high country of the Deerlodge National Forest. Significant historical mining activity is evidenced by the Chinese Diggings Placer Mine and other Placer Mine sites along the river's path, while agricultural operations like Larson Ranch and McCauley Ranch are established along the foothills. The terrain is deeply incised by numerous drainages such as McCarty Gulch and Killian Gulch, rising toward the heights of Bull Mountain and Ryan Mountain. This record captures a mix of institutional grounds, aviation at Boulder Airfield, and the water management systems of the Ditch and Sewage Disposal Ponds that supported the community's infrastructure.
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1886 · Fort Logan
USGS Topo · 1:250,000
1889 · Helena
USGS Topo · 1:250,000
1893 · Helena
USGS Topo · 1:250,000
1899 · Boulder
USGS Topo · 1:125,000
1899 · Helena
USGS Topo · 1:250,000
1903 · Helena
USGS Topo · 1:250,000
1947 · Butte
USGS Topo · 1:250,000
1948 · White Sulphur Springs
USGS Topo · 1:250,000
1950 · Devils Fence
USGS Topo · 1:62,500
1950 · Jefferson City
USGS Topo · 1:62,500