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2017 Map of Ervay Basin SW

Name: 2017 Topographic Map of Ervay Basin SW
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Rattlesnake Hills and the prominent Black Mtn dominate this high-desert landscape in Natrona County. The terrain is defined by a network of seasonal water sources and grazing lands, including Little Cross Meadows and the strategic McKenzie Spring. The movement of people and livestock across this arid region is traced by historic routes like the Waltman Sweetwater Freight Rd and Asbell Rd, which traverse the complex drainages of Sage Hen Cr and its various forks.

Evidence of water management in this dry environment is centered on the Boyle Reservoir to the south. Notable geological markers like French Rocks and the Deer Creek-Dry Creek Divide provide essential navigation points across the basins. This map preserves the 21st-century state of these traditional Wyoming ranching lands, where named draws like Holiday Draw continue to define the geography of the range.