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2017 Map of Big Marys Island

Name: 2017 Topographic Map of Big Marys Island
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Yellowstone River frontage and the intricate irrigation works of the Huntley Main Canal define the southern border of this Yellowstone County landscape. The terrain north of the river is characterized by a network of drainage features, including the aptly named Lost Cabin Coulee and the deep incision of Devils Gulch. These natural landmarks provide a glimpse into the land-use patterns of eastern Montana, where water management and topography dictate the placement of ranch roads and section boundaries.

Upland areas are traversed by established routes like Castle Butte Rd and Seven Mile Flat Rd, which connect the breaks and coulees. Tributaries such as Cow Gulch and Railroad Cr weave through the higher elevations, illustrating the watershed that feeds toward Big Marys Island. The map reflects a modern rural environment where historic township lines intersect with contemporary infrastructure and water rights.