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2014 Map of Big Sag

Name: 2014 Topographic Map of Big Sag
Creator: U.S. Geological Survey
Published: 2014
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2014

About this map

Highwood and the northern reaches of the Highwood Mountains define this landscape within Chouteau County. The terrain is characterized by a series of deep coulees and seasonal creeks, including Brown Coulee, Spring Coulee, and Big Sag Cr, which drain from the higher elevations of Gossack Mtn and Harris Mtn. These geological formations create a distinct tableland environment where the Big Sag Lake provides a notable water feature in an otherwise arid drainage basin.

Rural infrastructure is anchored by landmarks such as the Highwood Creek Bridge and the Upper Highwood Cem, indicating a long-established ranching community. The map details a network of local access roads including Swan Ranch Ln and Glab Coulee Rd, which navigate the complex topography between the peaks and the creek beds. This survey provides a precise view of Montana's high plains and mountain foothills, highlighting the relationship between water sources like Harris Spring and the rugged local peaks.