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1983 Map of Dillon

Name: 1983 Topographic Map of Dillon
Creator: U.S. Geological Survey
Published: 1983
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1983

About this map

The Beaverhead River and Ruby River valleys define this 1983 study of southwestern Montana, where the ranching hub of Dillon serves as the focal point for a landscape shaped by mining and water management. To the west, the Pioneer Mountains harbor a dense network of mineral claims, including the Argenta Mine and Legal Tender Mine near the settlement of Argenta. This area also includes the historic territorial capital at Bannack along Grasshopper Creek, illustrating the transition from early gold camps to established ranching districts.

Transportation corridors follow the natural topography, with Interstate 15 and the Union Pacific line tracking the river course. Notable landmarks like Beaverhead Rock State Monument and Pipe Organ Rock punctuate the basin, while the eastern edge is dominated by the Ruby Range and the industrial remnants of the Ruby Tailings near Alder. The presence of the Clark Canyon Reservoir and Ruby River Reservoir highlights the irrigation infrastructure critical to this high-country agricultural economy.