
This part of Phillips County, Montana, lies at the very edge of the northern frontier where the high plains meet the international border at Canada. The landscape is defined by an intricate network of north-flowing seasonal drainages and coulees, reflecting the hydrology of a high-altitude prairie system. While the map is sparse in terms of modern infrastructure or named settlements, the terrain data reveals a subtle series of ponds and wetlands that have historically supported grazing and local wildlife in this expansive northern reaches of the state. The proximity to the border at Canada underscores the geographical isolation of this region, which remains largely untouched by dense development even into the current era.
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This is the sole edition of this map. No revisions or reprints were ever made.
1954 · Glasgow
USGS Topo · 1:250,000
1957 · Glasgow
USGS Topo · 1:250,000
1958 · Glasgow
USGS Topo · 1:250,000
1984 · Thoeny Hills East
USGS Topo · 1:24,000
1984 · Black Calf Reservoir
USGS Topo · 1:24,000
1984 · Crow Creek Dam
USGS Topo · 1:24,000
2011 · Black Calf Reservoir
USGS Topo · 1:24,000
2011 · Thoeny Hills East
USGS Topo · 1:24,000
2011 · Crow Creek Dam
USGS Topo · 1:24,000
2014 · Thoeny Hills East
USGS Topo · 1:24,000