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2020 Map of Big Marys Island

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

USGS Topo · Published 2020

About this map

Yellowstone River hydraulics and the agricultural infrastructure of the Big Sky state define this quadrant northeast of Billings. The terrain is marked by a series of deep drainage features including Cow Gulch, Devils Gulch, and the evocative Lost Cabin Coulee, which cut through the high plains toward the river valley. The southern portion of the map reveals the complex irrigation system supporting local ranching and farming, specifically the Huntley Main Canal which runs parallel to the river and the Custer Frontage Rd.

Named for a prominent landform in the river's channel, Big Marys Island sits at a bend where the waterway meets smaller tributaries like Mill Cr and Sand Cr. Uplands are accessed via a sparse network of section-line roads such as Castle Butte Rd and Seven Mile Flat Rd, tracing the boundaries between Townships 3 and 4 North. This 2020 survey provides a modern baseline for the drainage patterns of Railroad Cr and Hibbard Cr in this rural stretch of Yellowstone County.