
The high peaks of the Pioneer Mountains define this section of the Beaverhead National Forest, where steep ridgelines reach their apex at summits like Tweedy Mtn and Torrey Mtn. This landscape is characterized by a dense network of glacial basins and high-altitude water bodies, including the Gorge Lakes to the north and the clustered Twin Lakes, Minneopa Lake, and Boatman Lake in the southern reaches. The drainage patterns show water moving through deep incisions like Sawlog Gulch and along Rattlesnake Creek. Human access is primarily limited to primitive corridors such as Birch Creek Rd and Mule Creek Rd, reflecting a wilderness area managed for its natural resources and watershed value. The survey detail highlights the intricate topography of the Eastern Pioneers, showing the transition from high alpine lake basins to the timbered slopes that feed into the larger river systems of Beaverhead County.
52 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
1893 · Dillon
USGS Topo · 1:250,000
1952 · Twin Adams Mountain
USGS Topo · 1:24,000
1952 · Argenta
USGS Topo · 1:24,000
1952 · Torrey 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
1958 · Dillon
USGS Topo · 1:250,000
1958 · Vipond Park
USGS Topo · 1:62,500
1959 · Polaris
USGS Topo · 1:62,500