
The Pioneer Mountains define the western reaches of this Beaverhead County landscape, where the terrain drops sharply into the Argenta Flats. This area is characterized by a high-desert hydrological network, anchored by the Dillon Reservoir and the drainage of Rattlesnake Creek. Notable landmarks include the prominent Burns Mtn and Timber Butte, which dominate the central and southern topography. The presence of several named water sources such as School Section Spring, Red Spring, and Albert Springs suggests the critical importance of water rights and livestock management in this arid stretch of Montana. The road network, including Ermont Rd and Big Hole Rd, follows the natural contours of the gulches, particularly around Ermont Gulch, reflecting the historical transit corridors used by early settlers and ranchers in the region.
38 named features on this map. Tap any name to fly to it.
Don’t see what you’re looking for? This feature index may not catch every label — zoom into the map to look around manually.
This is the sole edition of this map. No revisions or reprints were ever made.
1893 · Dillon
USGS Topo · 1:250,000
1952 · Argenta
USGS Topo · 1:24,000
1952 · Bannack
USGS Topo · 1:24,000
1952 · Burns Mountain
USGS Topo · 1:24,000
1952 · Eli Spring
USGS Topo · 1:24,000
1952 · Dalys
USGS Topo · 1:24,000
1952 · Gallagher Mountain
USGS Topo · 1:24,000
1952 · Ermont
USGS Topo · 1:24,000
1955 · Dillon
USGS Topo · 1:250,000
1957 · Dillon
USGS Topo · 1:250,000