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2020 Map of Big Ice Cave

Name: 2020 Topographic Map of Big Ice Cave
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

Custer National Forest encompasses this high-elevation landscape within the Pryor Mountains, where the namesake Big Ice Cave serves as a prominent geologic landmark. The terrain is defined by a series of steep drainages and flat-topped landforms, such as Roberts Bench and Harsten Flat, which overlook deep basins like Tibbs Hollow and Mill Hollow. This 2020 survey illustrates a remote wilderness utilized for its natural water sources, including Roberts Spring and Trappers Cabin Spring.

Transportation through the area is restricted to narrow routes like Shriver Peak Road and Red Pryor Divide, which navigate the complex topography around Big Pryor Mtn. The map also details the administrative boundary between Big Horn Co and Carbon Co, cutting across the northern reaches near Sage Cr. This modern data provides a clear view of the existing ridge systems, including Commissary Ridge and Island Ridge, which dictate the movement of water and travelers through this part of southern Montana.