The Blackfoot River cuts through this high-elevation landscape in Powell County, anchoring a drainage network that includes Chamberlain Cr, Pearson Cr, and Lobe Cr. The terrain is defined by several prominent peaks, including Chamberlain Mtn, Granite Mtn, and Dunigan Mtn, which rise above the valleys. The small settlement of Ovando sits at the northern edge of the map, serving as a gateway to this mountainous region.
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This is the sole edition of this map. No revisions or reprints were ever made.
1902 · Ovando
USGS Topo · 1:125,000
1905 · Ovando
USGS Topo · 1:125,000
1919 · Drummond
USGS Topo · 1:125,000
1921 · Drummond
USGS Topo · 1:125,000
1947 · Butte
USGS Topo · 1:250,000
1955 · Choteau
USGS Topo · 1:250,000
1957 · Choteau
USGS Topo · 1:250,000
1958 · Butte
USGS Topo · 1:250,000
1958 · Choteau
USGS Topo · 1:250,000
1960 · Butte
USGS Topo · 1:250,000