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2020 Map of Cotton Thomas Basin

Name: 2020 Topographic Map of Cotton Thomas Basin
Creator: U.S. Geological Survey
Published: 2020
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2020

About this map

Middle Mountain and the Goose Creek Mountains anchor this high-elevation corner where the Utah-Idaho state line divides Box Elder and Cassia counties. The landscape is defined by its drainage systems, with Granite Cr and Pine Cr flowing north across the border while Basin Cr and Mahogany Cr carve through the southern basins. A notable concentration of industrial history is found near Pipe Spring Gulch, where the Phelan Tunnel and Sullivan Tunnel remain as evidence of previous subterranean exploration.

Remote basins like Cotton Thomas Basin and Holt Basin are connected by a sparse network of gravel routes, including E Vipont Rd and Junction Valley Rd. The topography rises to distinct summits at Twin Peaks, providing a clear view of the transition into Junction Valley. This area represents a quiet, working landscape of high-altitude passes such as Granite Pass and the secluded Horse Heaven Gulch.