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2011 Map of Big Marys Island

Name: 2011 Topographic Map of Big Marys Island
Creator: U.S. Geological Survey
Published: 2011
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2011

About this map

The Yellowstone River cuts across the southern portion of this landscape, defining a corridor of braided water channels and islands. Centered in this riparian zone is Big Marys Island, flanked by the steep drainage of Devils Gulch. This area in Yellowstone County illustrates the sharp transition from the fertile river bottom to the high, arid benches of the Montana plains.

Upland drainage patterns are etched into the terrain by features like Cow Gulch, Railroad Creek, and the isolated Lost Cabin Coulee in the southwest. A grid of rural roads, including Seven Mile Flat Rd and Castle Butte Rd, provides access to the vast ranching and agricultural lands above the river valley. In the southeast, the landscape is further shaped by Mill Creek and Fly Creek as they approach the primary river system.