Boulder serves as the primary hub in this Jefferson County landscape, where the Boulder River winds through a valley defined by deep gulches and significant ranching history. The settlement is anchored by community landmarks such as the Boulder Post Office, the Boulder Vol Fire Dept, and the local Boulder Cemetery. Evidence of historical land use appears at the Chinese Diggins west of the river, while the presence of the Boulder River School and Hospital and the Boulder Airport indicates the town's role as a regional service center.
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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